diff --git a/fields/calendar.py b/fields/calendar.py
index cdceec1..36b323e 100644
--- a/fields/calendar.py
+++ b/fields/calendar.py
@@ -12,14 +12,15 @@ class Calendar(Field):
     '''This field allows to produce an agenda (monthly view) and view/edit
        events on it.'''
     jsFiles = {'view': ('calendar.js',)}
+    DateTime = DateTime
 
     # Month view for a calendar. Called by pxView, and directly from the UI,
     # via Ajax, when the user selects another month.
-    pxMonthView = Px('''
+    pxViewMonth = Px('''
      <div var="ajaxHookId=zobj.id + field.name;
                month=req['month'];
-               monthDayOne=DateTime('%s/01' % month);
-               today=DateTime('00:00');
+               monthDayOne=field.DateTime('%s/01' % month);
+               today=field.DateTime('00:00');
                grid=field.getMonthGrid(month);
                allEventTypes=field.getEventTypes(zobj);
                preComputed=field.getPreComputedInfo(zobj, monthDayOne, grid);
@@ -34,8 +35,8 @@ class Calendar(Field):
                otherCalendars=field.getOtherCalendars(zobj, preComputed)"
           id=":ajaxHookId">
 
-      <script type="text/javascript">:'var %s_maxEventLength = %d' % \
-                                     (field.name, field.maxEventLength)</script>
+      <script>:'var %s_maxEventLength = %d;' % \
+                (field.name, field.maxEventLength)</script>
 
       <!-- Month chooser -->
       <div style="margin-bottom: 5px"
@@ -90,14 +91,12 @@ class Calendar(Field):
                    mayCreate=mayEdit and not events;
                    mayDelete=mayEdit and events;
                    day=date.day();
-                   dayString=date.strftime('%Y/%m/%d')"
-             style="date.isCurrentDay() and 'font-weight:bold' or \
-                                            'font-weight:normal'"
-             class=":cssClasses"
-             onmouseover=":mayEdit and 'this.getElementsByTagName(\
-               %s)[0].style.visibility=%s' % (q('img'), q('visible')) or ''"
-             onmouseout="mayEdit and 'this.getElementsByTagName(\
-               %s)[0].style.visibility=%s' % (q('img'), q('hidden')) or ''">
+                   dayString=date.strftime('%Y/%m/%d');
+                   js=mayEdit and 'toggleVisibility(this, %s)' % q('img') \
+                      or ''"
+             style=":date.isCurrentDay() and 'font-weight:bold' or \
+                                             'font-weight:normal'"
+             class=":cssClasses" onmouseover=":js" onmouseout=":js">
           <span>:day</span>
           <span if="day == 1">:_('month_%s_short' % date.aMonth())</span>
           <!-- Icon for adding an event -->
@@ -138,11 +137,11 @@ class Calendar(Field):
       <div var="prefix='%s_newEvent' % field.name;
                 popupId=prefix + 'Popup'"
            id=":popupId" class="popup" align="center">
-       <form id="prefix + 'Form'" method="post">
+       <form id=":prefix + 'Form'" method="post">
         <input type="hidden" name="fieldName" value=":field.name"/>
         <input type="hidden" name="month" value=":month"/>
         <input type="hidden" name="name" value=":field.name"/>
-        <input type="hidden" name="action" value="Process"/>
+        <input type="hidden" name="action" value="process"/>
         <input type="hidden" name="actionType" value="createEvent"/>
         <input type="hidden" name="day"/>
 
@@ -177,11 +176,11 @@ class Calendar(Field):
         <input type="hidden" name="fieldName" value=":field.name"/>
         <input type="hidden" name="month" value=":month"/>
         <input type="hidden" name="name" value=":field.name"/>
-        <input type="hidden" name="action" value="Process"/>
+        <input type="hidden" name="action" value="process"/>
         <input type="hidden" name="actionType" value="deleteEvent"/>
         <input type="hidden" name="day"/>
-
-        <div align="center" style="margin-bottom: 5px">_('action_confirm')</div>
+        <div align="center"
+             style="margin-bottom: 5px">:_('action_confirm')</div>
 
         <!-- Delete successive events ? -->
         <div class="discreet" style="margin-bottom: 10px"
@@ -205,7 +204,7 @@ class Calendar(Field):
     pxView = pxCell = Px('''
      <x var="defaultDate=field.getDefaultDate(zobj);
              x=req.set('month', defaultDate.strftime('%Y/%m'));
-             x=req.set('fieldName', field.name)">:field.pxMonthView</x>''')
+             x=req.set('fieldName', field.name)">:field.pxViewMonth</x>''')
 
     pxEdit = pxSearch = ''
 
diff --git a/fields/group.py b/fields/group.py
index 97d6cb7..8d71fc6 100644
--- a/fields/group.py
+++ b/fields/group.py
@@ -219,7 +219,7 @@ class UiGroup:
       </tr>
       <!-- The rows of widgets -->
       <tr valign=":field.valign" for="row in field.elements">
-       <td for="field in row" colspan=":field.colspan"
+       <td for="field in row" colspan=":field.colspan|1"
            style=":not loop.field.last and ('padding-right:%s'% cellgap) or ''">
         <x if="field">
          <x if="field.type == 'group'">:field.pxView</x>
diff --git a/fields/pod.py b/fields/pod.py
index 8949de2..8112de3 100644
--- a/fields/pod.py
+++ b/fields/pod.py
@@ -51,6 +51,9 @@ class Pod(Field):
     # "r"ight "m"ulti-template (where the global field label is not used
     rmLayouts = {'view': Table('f!', css_class='podTable')}
     allFormats = {'.odt': ('pdf', 'doc', 'odt'), '.ods': ('xls', 'ods')}
+    # Parameters needed to perform a query for query-related pods
+    queryParams = ('className', 'search', 'sortKey', 'sortOrder',
+                   'filterKey', 'filterValue')
 
     POD_ERROR = 'An error occurred while generating the document. Please ' \
                 'contact the system administrator.'
@@ -67,7 +70,8 @@ class Pod(Field):
           src=":url(fmt + iconSuffix)" class="clickable"
           title=":field.getIconTitle(obj, fmt, frozen)"
           onclick=":'generatePod(this,%s,%s,%s,%s,%s,null,%s)' % (q(uid), \
-          q(name), q(info.template), q(fmt), q(ztool.getQueryInfo()), gc)"/>''')
+          q(name), q(info.template), q(fmt), q(field.getQueryInfo(req)), \
+          gc)"/>''')
 
     pxView = pxCell = Px('''
      <x var="uid=obj.uid;
@@ -127,7 +131,7 @@ class Pod(Field):
            <td colspan="2">
             <a var="js='generatePod(this,%s,%s,%s,%s,%s,null,%s,%s)' % \
                        (q(uid), q(name), q(info.template), q(fmt), \
-                        q(ztool.getQueryInfo()), gc, q(mailing))"
+                        q(field.getQueryInfo(req)), gc, q(mailing))"
                onclick=":'askConfirm(%s,%s)' % (q('script'), q(js, False))"
                title=":sendLabel">
              <img src=":url('email')" align="left" style="margin-right: 2px"/>
@@ -538,7 +542,7 @@ class Pod(Field):
         # result in the pod context.
         if queryData:
             # Retrieve query params
-            cmd = ', '.join(tool.o.queryParamNames)
+            cmd = ', '.join(Pod.queryParams)
             cmd += " = queryData.split(';')"
             exec cmd
             # (re-)execute the query, but without any limit on the number of
@@ -734,6 +738,13 @@ class Pod(Field):
             setattr(res['_checked'], self.getChecked, objects)
         return res
 
+    def getQueryInfo(self, req):
+        '''This method encodes in a string all the params in the request that
+           are required for re-triggering a search.'''
+        if not req.has_key('search'): return ''
+        return ';'.join([req.get(key,'').replace(';','') \
+                        for key in Pod.queryParams])
+
     def onUiRequest(self, obj, rq):
         '''This method is called when an action tied to this pod field
            (generate, freeze, upload...) is triggered from the user
diff --git a/fields/ref.py b/fields/ref.py
index 9beca30..1fb8fdd 100644
--- a/fields/ref.py
+++ b/fields/ref.py
@@ -1270,17 +1270,15 @@ class Ref(Field):
         px = (params['scope'] == 'poss') and 'pxViewPickList' or 'pxView'
         px = '%s:%s' % (self.name, px)
         params = sutils.getStringDict(params)
-        return "getAjaxHook('%s',true)['ajax']=new AjaxData('%s', " \
-               "'%s', %s, null, '%s')" % \
-               (hook, hook, px, params, zobj.absolute_url())
+        return "new AjaxData('%s', '%s', %s, null, '%s')" % \
+               (hook, px, params, zobj.absolute_url())
 
     def getAjaxDataRow(self, obj, parentHook, **params):
         '''Initializes an AjaxData object on the DOM node corresponding to
            p_hook = a row within the list of referred objects.'''
         hook = obj.id
-        return "getAjaxHook('%s',true)['ajax']=new AjaxData('%s', " \
-               "'pxViewAsTiedFromAjax',%s,'%s','%s')" % \
-               (hook, hook, sutils.getStringDict(params), parentHook, obj.url)
+        return "new AjaxData('%s', 'pxViewAsTiedFromAjax', %s, '%s', '%s')" % \
+               (hook, sutils.getStringDict(params), parentHook, obj.url)
 
     def doChangeOrder(self, obj):
         '''Moves a referred object up/down/top/bottom.'''
diff --git a/fields/search.py b/fields/search.py
index 8ce466b..8645094 100644
--- a/fields/search.py
+++ b/fields/search.py
@@ -278,8 +278,7 @@ class UiSearch:
                target=ztool.getLinksTargetInfo(klass)"
           id=":ajaxHookId">
 
-      <x if="zobjects or filterValue">
-       <!-- Display here POD templates if required -->
+      <x if="zobjects or filterValue"> <!-- Pod templates -->
        <table var="fields=ztool.getResultPodFields(className);
                    layoutType='view'"
               if="not inPopup and zobjects and fields" align=":dright">
@@ -404,22 +403,21 @@ class UiSearch:
         # not needed because included in the PX name. But they are requested by
         # sub-Ajax queries at the row level.
         params['className'] = self.className
-        params['searchName'] = self.name
+        params['searchName'] = params['search'] = self.name
         req = ztool.REQUEST
         for param, default in UiSearch.sortFilterDefaults.iteritems():
             params[param] = req.get(param, default)
         # Convert params into a JS dict
         params = sutils.getStringDict(params)
         px = '%s:%s:pxResult' % (self.className, self.name)
-        return "getAjaxHook('%s',true)['ajax']=new AjaxData('%s', '%s', %s, " \
-               "null, '%s')" % (hook, hook, px, params, ztool.absolute_url())
+        return "new AjaxData('%s', '%s', %s, null, '%s')" % \
+               (hook, px, params, ztool.absolute_url())
 
     def getAjaxDataRow(self, zobj, parentHook, **params):
         '''Initializes an AjaxData object on the DOM node corresponding to
            p_hook = a row within the list of results.'''
         hook = zobj.id
-        return "getAjaxHook('%s',true)['ajax']=new AjaxData('%s', " \
-               "'pxViewAsResultFromAjax',%s,'%s','%s')" % \
-               (hook, hook, sutils.getStringDict(params), parentHook,
+        return "new AjaxData('%s', 'pxViewAsResultFromAjax', %s, '%s', '%s')"% \
+               (hook, sutils.getStringDict(params), parentHook,
                 zobj.absolute_url())
 # ------------------------------------------------------------------------------
diff --git a/fields/string.py b/fields/string.py
index 4988a29..4651c82 100644
--- a/fields/string.py
+++ b/fields/string.py
@@ -434,14 +434,15 @@ class String(Field):
             self.sdefault = []
         # Default width, height and maxChars vary according to String format
         if width == None:
-            if format == String.TEXT:  self.width  = 60
-            # This width corresponds to the standard width of an Appy page.
-            if format == String.XHTML: self.width  = None
-            else:                      self.width  = 30
+            if format == String.TEXT:    self.width  = 60
+            # This width corresponds to the standard width of an Appy page
+            elif format == String.XHTML: self.width  = None
+            else:                        self.width  = 30
         if height == None:
-            if format == String.TEXT: self.height = 5
-            elif self.isSelect:       self.height = 4
-            else:                     self.height = 1
+            if format == String.TEXT:    self.height = 5
+            elif format == String.XHTML: self.height  = None
+            elif self.isSelect:          self.height = 4
+            else:                        self.height = 1
         if maxChars == None:
             if self.isSelect: pass
             elif format == String.LINE: self.maxChars = 256
@@ -987,6 +988,7 @@ class String(Field):
                    'format_tags': ';'.join(self.styles),
                    'scayt_sLang': self.getCkLanguage(obj, language)}
         if self.width: ckAttrs['width'] = self.width
+        if self.height: ckAttrs['height'] = self.height
         if self.spellcheck: ckAttrs['scayt_autoStartup'] = True
         if self.allowImageUpload:
             ckAttrs['filebrowserUploadUrl'] = '%s/upload' % obj.absolute_url()
diff --git a/gen/__init__.py b/gen/__init__.py
index 1715397..1c64467 100644
--- a/gen/__init__.py
+++ b/gen/__init__.py
@@ -73,7 +73,9 @@ class Config:
     # of classes defined in your application.
     defaultCreators = ['Manager']
     # The "root" classes are those that will get their menu in the user
-    # interface. Put their names in the list below.
+    # interface. Put their names in the list below. If you leave the list empty,
+    # all gen-classes will be considered root classes (the default). If
+    # rootClasses is None, no class will be considered as root.
     rootClasses = []
     # Number of translations for every page on a Translation object
     translationsPerPage = 30
diff --git a/gen/mixins/ToolMixin.py b/gen/mixins/ToolMixin.py
index 37f8876..2382b2b 100644
--- a/gen/mixins/ToolMixin.py
+++ b/gen/mixins/ToolMixin.py
@@ -226,6 +226,7 @@ class ToolMixin(BaseMixin):
         '''Returns the list of root classes for this application'''
         cfg = self.getProductConfig().appConfig
         rootClasses = cfg.rootClasses
+        if rootClasses == None: return [] # No root class at all
         if not rootClasses:
             # We consider every class as being a root class
             rootClasses = self.getProductConfig().appClassNames
@@ -259,19 +260,6 @@ class ToolMixin(BaseMixin):
             fields.append(field)
         return Object(fields=fields, nbOfColumns=nbOfColumns)
 
-    queryParamNames = ('className', 'search', 'sortKey', 'sortOrder',
-                       'filterKey', 'filterValue')
-    def getQueryInfo(self):
-        '''If we are showing search results, this method encodes in a string all
-           the params in the request that are required for re-triggering the
-           search.'''
-        rq = self.REQUEST
-        res = ''
-        if rq.has_key('search'):
-            res = ';'.join([rq.get(key,'').replace(';','') \
-                            for key in self.queryParamNames])
-        return res
-
     def showPortlet(self, obj, layoutType):
         '''When must the portlet be shown? p_obj and p_layoutType can be None
            if we are not browing any objet (ie, we are on the home page).'''
diff --git a/gen/ui/appy.js b/gen/ui/appy.js
index e4e1ea5..db2888e 100644
--- a/gen/ui/appy.js
+++ b/gen/ui/appy.js
@@ -246,6 +246,8 @@ function AjaxData(hook, px, params, parentHook, url, mode, beforeSend, onGet) {
   /* If a parentHook is spefified, this AjaxData must be completed with a parent
      AjaxData instance. */
   this.parentHook = parentHook;
+  // Inject this AjaxData instance into p_hook
+  getAjaxHook(hook, true)['ajax'] = this;
 }
 
 function askAjax(hook, form, params) {
@@ -269,6 +271,12 @@ function askAjax(hook, form, params) {
       }
     }
   }
+  // Resolve dynamic parameter "cbChecked" if present
+  if ('cbChecked' in d.params) {
+    var cb = getAjaxHook(d.params['cbChecked'], true);
+    if (cb) d.params['cbChecked'] = cb.checked;
+    else delete d.params['cbChecked'];
+  }
   // If a p_form id is given, integrate the form submission in the ajax request
   if (form) {
     var f = document.getElementById(form);
diff --git a/gen/ui/calendar.js b/gen/ui/calendar.js
index 9a58aa4..3469c21 100644
--- a/gen/ui/calendar.js
+++ b/gen/ui/calendar.js
@@ -1,7 +1,17 @@
+function toggleVisibility(node, nodeType){
+  // Toggle visibility of all elements having p_nodeType within p_node
+  var elements = node.getElementsByTagName(nodeType);
+  for (var i=0; i<elements.length; i++){
+    var sNode = elements[i];
+    if (sNode.style.visibility == 'hidden') sNode.style.visibility = 'visible';
+    else sNode.style.visibility = 'hidden';
+  }
+}
+
 function askMonthView(hookId, objectUrl, fieldName, month) {
   // Sends an Ajax request for getting the view month of a calendar field
   var params = {'month': month};
-  askAjaxChunk(hookId, 'GET', objectUrl, fieldName+':pxMonthView', params);
+  askAjaxChunk(hookId, 'GET', objectUrl, fieldName+':pxViewMonth', params);
 }
 
 function openEventPopup(action, fieldName, day, spansDays,
@@ -78,7 +88,7 @@ function triggerCalendarEvent(action, hookId, fieldName, objectUrl,
   }
   var elems = f.elements;
   var params = {};
-  // Put form elements into "params".
+  // Put form elements into "params"
   for (var i=0; i < elems.length; i++) {
     params[elems[i].name] = elems[i].value;
   }
diff --git a/gen/wrappers/UserWrapper.py b/gen/wrappers/UserWrapper.py
index 6b4254f..3844d1d 100644
--- a/gen/wrappers/UserWrapper.py
+++ b/gen/wrappers/UserWrapper.py
@@ -121,8 +121,8 @@ class UserWrapper(AbstractWrapper):
         zopeUser = self.getZopeUser()
         tool = self.tool.o
         zopeUser.__ = self.encryptPassword(newPassword)
-        req = tool.REQUEST
-        if hasattr(req, 'user') and (req.userLogin == login):
+        req = getattr(tool, 'REQUEST', None)
+        if req and hasattr(req, 'user') and (req.userLogin == login):
             # The user for which we change the password is the currently logged
             # user. So update the authentication cookie, too.
             gutils.writeCookie(login, newPassword, self.request)
diff --git a/gen/wrappers/__init__.py b/gen/wrappers/__init__.py
index 0b23e10..4f12fb9 100644
--- a/gen/wrappers/__init__.py
+++ b/gen/wrappers/__init__.py
@@ -575,18 +575,20 @@ class AbstractWrapper(object):
      <tr valign="top" class=":rowCss"
          var2="tiedUid=tied.o.id;
                objectIndex=field.getIndexOf(zobj, tiedUid)|None;
-               mayView=tied.o.mayView()"
+               mayView=tied.o.mayView();
+               cbId='%s_%s' % (ajaxHookId, currentNumber)"
          id=":tiedUid">
       <td if="not inPickList and numbered">:field.pxNumber</td>
       <td if="checkboxes" class="cbCell">
-       <input if="mayView" type="checkbox" name=":ajaxHookId" checked="checked"
+       <input if="mayView" type="checkbox" name=":ajaxHookId" id=":cbId"
+              var2="checked=cbChecked|True" checked=":checked"
               value=":tiedUid" onclick="toggleCb(this)"/>
       </td>
       <td for="column in columns" width=":column.width" align=":column.align"
           var2="refField=column.field">:refField.pxRenderAsTied</td>
       <!-- Store data in this tr node allowing to ajax-refresh it -->
       <script>:field.getAjaxDataRow(tied, ajaxHookId, rowCss=rowCss, \
-               currentNumber=currentNumber)</script>
+               currentNumber=currentNumber, cbChecked=cbId)</script>
      </tr>''')
 
     # When calling pxViewAsTied from Ajax, this surrounding PX is called to
@@ -624,18 +626,18 @@ class AbstractWrapper(object):
                cbId='%s_%s' % (checkboxesId, currentNumber)"
          id=":zobj.id" class=":rowCss" valign="top">
       <!-- A checkbox if required -->
-      <td if="checkboxes" class="cbCell" id=":cbId"
-          style=":'display:%s' % cbDisplay">
+      <td if="checkboxes" class="cbCell" style=":'display:%s' % cbDisplay">
        <input type="checkbox" name=":checkboxesId" checked="checked"
-              value=":zobj.id" onclick="toggleCb(this)"/>
+              var2="checked=cbChecked|True" value=":zobj.id"
+              onclick="toggleCb(this)" id=":cbId"/>
       </td>
       <td for="column in columns"
           var2="field=column.field" id=":'field_%s' % field.name"
           width=":column.width"
           align=":column.align">:field.pxRenderAsResult</td>
      <!-- Store data in this tr node allowing to ajax-refresh it -->
-     <script>:uiSearch.getAjaxDataRow(zobj, ajaxHookId, \
-               currentNumber=currentNumber, rowCss=rowCss)</script>
+     <script>:uiSearch.getAjaxDataRow(zobj, ajaxHookId, rowCss=rowCss, \
+              currentNumber=currentNumber, cbChecked=cbId)</script>
      </tr>''')
 
     # When calling pxViewAsResult from Ajax, this surrounding PX is called to
@@ -1291,7 +1293,7 @@ class AbstractWrapper(object):
             i -= 1
 
     def removeEvent(self, event):
-        '''Removes p_event from this object's history.'''
+        '''Removes p_event from this object's history'''
         res = []
         # Because data change events carry the workflow state, we must ensure
         # that, after having removed p_event, this workflow state is still
@@ -1313,7 +1315,7 @@ class AbstractWrapper(object):
         return self.o.formatText(text, format)
 
     def listStates(self):
-        '''Lists the possible states for this object.'''
+        '''Lists the possible states for this object'''
         res = []
         o = self.o
         workflow = o.getWorkflow()
@@ -1325,7 +1327,7 @@ class AbstractWrapper(object):
         return res
 
     def path(self, name):
-        '''Returns the absolute file name of file stored in File field p_nnamed
+        '''Returns the absolute file name of file stored in File field p_named
            p_name.'''
         v = getattr(self, name)
         if v: return v.getFilePath(self)
@@ -1337,7 +1339,7 @@ class AbstractWrapper(object):
         return o.getAppyType(name).getIndexOf(o, obj.uid)
 
     def allows(self, permission, raiseError=False):
-        '''Check doc @Mixin.allows.'''
+        '''Check doc @Mixin.allows'''
         return self.o.allows(permission, raiseError=raiseError)
 
     def resetLocalRoles(self):