diff --git a/fields/action.py b/fields/action.py
index ecdf479..c1db238 100644
--- a/fields/action.py
+++ b/fields/action.py
@@ -28,20 +28,20 @@ class Action(Field):
     # PX for viewing the Action button.
     pxView = pxCell = Px('''
      <form var="formId='%s_%s_form' % (zobj.id, name);
-                label=_(field.labelId)"
+                label=_(field.labelId);
+                buttonWidth=ztool.getButtonWidth(label)"
            id=":formId" action=":ztool.absolute_url() + '/do'">
       <input type="hidden" name="action" value="ExecuteAction"/>
       <input type="hidden" name="objectUid" value=":zobj.id"/>
       <input type="hidden" name="fieldName" value=":name"/>
       <input if="field.confirm" type="button" class="button"
-         var="labelConfirm=_(field.labelId + '_confirm')"
-         value=":ztool.truncateValue(label)" title=":label"
-         style=":url('buttonAction', bg=True)"
+         var="labelConfirm=_(field.labelId + '_confirm')" value=":label"
+         style=":'%s; %s' % (url('action', bg=True), buttonWidth)"
          onclick=":'askConfirm(%s,%s,%s)' % (q('form'), q(formId), \
                                              q(labelConfirm))"/>
       <input if="not field.confirm" type="submit" class="button" name="do"
-             value=":ztool.truncateValue(label)" title=":label"
-             style=":url('buttonAction', bg=True)"/>
+             value=":label"
+             style=":'%s; %s' % (url('action', bg=True), buttonWidth)"/>
      </form>''')
 
     # It is not possible to edit an action, not to search it.
diff --git a/fields/ref.py b/fields/ref.py
index 9d877b5..bb46894 100644
--- a/fields/ref.py
+++ b/fields/ref.py
@@ -56,23 +56,26 @@ class Ref(Field):
     # objects (delete many, unlink many,...)
     pxGlobalActions = Px('''
      <!-- Insert several objects (if in pick list) -->
-     <input if="inPickList" var2="action='link'" type="button" class="button"
-            value=":_('object_link_many')"
+     <input if="inPickList" type="button" class="button"
+            var2="action='link'; label=_('object_link_many')" value=":label"
             onclick=":'onLinkMany(%s,%s)' % (q(action), q(ajaxHookId))"
-            style=":url('linkMany', bg=True)"/>
+            style=":'%s; %s' % (url('linkMany', bg=True), \
+                                ztool.getButtonWidth(label))"/>
      <!-- Unlink several objects -->
      <input if="not isBack and field.unlink and canWrite and not inPickList"
             var2="imgName=linkList and 'unlinkManyUp' or 'unlinkMany';
-                  action='unlink'"
-            type="button" class="button" value=":_('object_unlink_many')"
+                  action='unlink'; label=_('object_unlink_many')"
+            type="button" class="button" value=":label"
             onclick=":'onLinkMany(%s,%s)' % (q(action), q(ajaxHookId))"
-            style=":url(imgName, bg=True)"/>
+            style=":'%s; %s' % (url(imgName, bg=True), \
+                                ztool.getButtonWidth(label))"/>
      <!-- Delete several objects -->
      <input if="not isBack and field.delete and canWrite"
-            var2="action='delete'"
-            type="button" class="button" value=":_('object_delete_many')"
+            var2="action='delete'; label=_('object_delete_many')"
+            type="button" class="button" value=":label"
             onclick=":'onLinkMany(%s,%s)' % (q(action), q(ajaxHookId))"
-            style=":url('deleteMany', bg=True)"/>
+            style=":'%s; %s' % (url('deleteMany', bg=True), \
+                                ztool.getButtonWidth(label))"/>
      ''')
 
     # This PX displays icons for triggering actions on a given referenced object
@@ -152,9 +155,10 @@ class Ref(Field):
                            '%d,%s' % (startNumber, q('CreateWithoutForm')));
               noFormCall=not field.addConfirm and noFormCall or \
                 'askConfirm(%s, %s, %s)' % (q('script'), q(noFormCall), \
-                                            q(addConfirmMsg))"
-        style=":url('buttonAdd', bg=True)" value=":_('add_ref')"
-        onclick=":field.noForm and noFormCall or formCall"/>''')
+                                            q(addConfirmMsg));
+              label=_('add_ref')"
+        style=":'%s; %s' % (url('add', bg=True), ztool.getButtonWidth(label))"
+        value=":label" onclick=":field.noForm and noFormCall or formCall"/>''')
 
     # This PX displays, in a cell header from a ref table, icons for sorting the
     # ref field according to the field that corresponds to this column.
@@ -215,7 +219,9 @@ class Ref(Field):
         <x>:field.pxAdd</x>
         <!-- The search button if field is queryable -->
         <input if="objects and field.queryable" type="button" class="button"
-               style=":url('buttonSearch', bg=True)" value=":_('search_title')"
+               var2="label=_('search_title')" value=":label"
+               style=":'%s; %s' % (url('search', bg=True), \
+                                   ztool.getButtonWidth(label))"
                onclick=":'goto(%s)' % \
                 q('%s/search?className=%s&amp;ref=%s:%s' % \
                 (ztool.absolute_url(), tiedClassName, zobj.id, field.name))"/>
@@ -235,7 +241,7 @@ class Ref(Field):
         <tr if="field.showHeaders">
          <th if="not inPickList and numbered" width=":numbered"></th>
          <th for="column in columns" width=":column.width"
-             align="column.align" var2="refField=column.field">
+             align=":column.align" var2="refField=column.field">
           <span>:_(refField.labelId)</span>
           <x>:field.pxSortIcons</x>
           <x var="className=tiedClassName;
diff --git a/fields/workflow.py b/fields/workflow.py
index 52f6bcc..ce9922d 100644
--- a/fields/workflow.py
+++ b/fields/workflow.py
@@ -310,8 +310,8 @@ class Transition:
                     if user.has_role(condition, obj):
                         hasRole = True
                 else: # It is a method
-                    if not condition(wf, obj.appy()):
-                        return False
+                    res = condition(wf, obj.appy())
+                    if not res: return res # False or a No instance.
             if hasRole != False:
                 return True
 
@@ -387,18 +387,20 @@ class UiTransition:
     
     pxView = Px('''<x>
       <!-- Real button -->
-      <input if="transition.mayTrigger"
-             type="button" class="button" title=":transition.title"
-             style=":url('buttonTransition', bg=True)"
-             value=":ztool.truncateValue(transition.title)"
+      <input if="transition.mayTrigger" type="button" class="button"
+             var2="label=transition.title"
+             style=":'%s; %s' % (url('transition', bg=True), \
+                                 ztool.getButtonWidth(label))"
+             value=":label"
              onclick=":'triggerTransition(%s,%s,%s)' % (q(formId), \
                         q(transition.name), q(transition.confirm))"/>
 
       <!-- Fake button, explaining why the transition can't be triggered -->
-      <input type="button" class="button" if="not transition.mayTrigger"
-             style=":url('buttonFake', bg=True) + ';cursor: help'"
-             value=":ztool.truncateValue(transition.title)"
-             title=":'%s: %s' % (transition.title, transition.reason)"/>
+      <input if="not transition.mayTrigger" type="button"
+             class="fakeButton button" var2="label=transition.title"
+             style=":'%s; %s' % (url('fake', bg=True),
+                                 ztool.getButtonWidth(label))"
+             value=":label" title=":'%s: %s' % (label, transition.reason)"/>
      </x>''')
 
     def __init__(self, name, transition, obj, mayTrigger, ):
diff --git a/gen/layout.py b/gen/layout.py
index 140b625..b3d3874 100644
--- a/gen/layout.py
+++ b/gen/layout.py
@@ -211,15 +211,10 @@ class Table:
 # Some base layouts to use, for fields and pages -------------------------------
 # The default layouts for pages.
 defaultPageLayouts  = {
-    'view': Table('w|-b|', align="center"),
-    'edit': Table('w|-b|', width=None)}
+    'view': Table('w-b'), 'edit': Table('w-b', width=None)}
 # A layout for pages, containing the page summary.
-summaryPageLayouts = {'view': Table('s-w|-b|', align="center"),
-                      'edit': Table('w|-b|', width=None)}
-widePageLayouts = {
-    'view': Table('w|-b|', align="center"),
-    'edit': Table('w|-b|')
-}
+summaryPageLayouts = {'view': Table('s-w-b'), 'edit': Table('w-b', width=None)}
+widePageLayouts = {'view': Table('w-b'), 'edit': Table('w-b')}
 centeredPageLayouts = {
     'view': Table('w|-b|', align="center"),
     'edit': Table('w|-b|', width=None, align='center')
diff --git a/gen/mixins/ToolMixin.py b/gen/mixins/ToolMixin.py
index a8a960d..aef6be8 100644
--- a/gen/mixins/ToolMixin.py
+++ b/gen/mixins/ToolMixin.py
@@ -1352,4 +1352,15 @@ class ToolMixin(BaseMixin):
                "s.parentNode.insertBefore(ga, s);\n" \
                "})();\n" % gaId
         return code
+
+    def getButtonWidth(self, label):
+        '''Determine button width, in pixels, corresponding to the button
+           p_label.'''
+        l = len(label)
+        if l < 10:
+            width = '130px'
+        else:
+            # Consider 1 char = 6 pixels wide.
+            width = '%dpx' % (130 + ((l-10)*4))
+        return 'width:%s' % width
 # ------------------------------------------------------------------------------
diff --git a/gen/mixins/__init__.py b/gen/mixins/__init__.py
index 3dd8e2d..90d2aec 100644
--- a/gen/mixins/__init__.py
+++ b/gen/mixins/__init__.py
@@ -855,7 +855,7 @@ class BaseMixin:
              can't trigger, but for which he needs to know for what reason he
              can't trigger it;
            * if p_includeNotShowable is True, it includes transitions for which
-             show=False. Indeed, because "showability" is only a GUI concern,
+             show=False. Indeed, because "showability" is only a UI concern,
              and not a security concern, in some cases it has sense to set
              includeNotShowable=True, because those transitions are triggerable
              from a security point of view.
diff --git a/gen/ui/action.png b/gen/ui/action.png
new file mode 100644
index 0000000..e8f3107
Binary files /dev/null and b/gen/ui/action.png differ
diff --git a/gen/ui/add.png b/gen/ui/add.png
new file mode 100644
index 0000000..580ef51
Binary files /dev/null and b/gen/ui/add.png differ
diff --git a/gen/ui/appy.css b/gen/ui/appy.css
index 9659ca9..7cdd033 100644
--- a/gen/ui/appy.css
+++ b/gen/ui/appy.css
@@ -66,9 +66,11 @@ img { border: 0; vertical-align: middle }
             background-color: #dbdde1; font-weight: bold }
 .navigate td { padding: 4px 9px }
 .login { margin: 3px; color: black }
-input.button { border-width: 0 !important; color: #666666; height: 24px;
-           width: 150px; cursor:pointer; font-size: 90%; padding: 1px 0 0 10px;
-           background-color: transparent !important }
+input.button { color: #666666; height: 20px; width: 130px;
+               cursor:pointer; font-size: 90%; padding-left: 10px;
+               background-color: white; background-repeat: no-repeat;
+               background-position: 5% 25%; box-shadow: 2px 2px 2px #888888}
+.fakeButton { background-color: #e6e6e6 !important ; cursor:help !important }
 .buttons { margin-left: 4px }
 .message { position: absolute; top: -40px; left: 50%; font-size: 90%;
            width: 600px; border: 1px #F0C36D solid; padding: 6px;
diff --git a/gen/ui/buttonAction.png b/gen/ui/buttonAction.png
deleted file mode 100644
index 298d49d..0000000
Binary files a/gen/ui/buttonAction.png and /dev/null differ
diff --git a/gen/ui/buttonAdd.png b/gen/ui/buttonAdd.png
deleted file mode 100644
index b0a08be..0000000
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diff --git a/gen/ui/buttonCancel.png b/gen/ui/buttonCancel.png
deleted file mode 100644
index ebd145c..0000000
Binary files a/gen/ui/buttonCancel.png and /dev/null differ
diff --git a/gen/ui/buttonEdit.png b/gen/ui/buttonEdit.png
deleted file mode 100644
index d0b94f2..0000000
Binary files a/gen/ui/buttonEdit.png and /dev/null differ
diff --git a/gen/ui/buttonFake.png b/gen/ui/buttonFake.png
deleted file mode 100644
index bb31c6a..0000000
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diff --git a/gen/ui/buttonNext.png b/gen/ui/buttonNext.png
deleted file mode 100644
index 714433a..0000000
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diff --git a/gen/ui/buttonPrevious.png b/gen/ui/buttonPrevious.png
deleted file mode 100644
index c55618a..0000000
Binary files a/gen/ui/buttonPrevious.png and /dev/null differ
diff --git a/gen/ui/buttonSave.png b/gen/ui/buttonSave.png
deleted file mode 100644
index 9896c2e..0000000
Binary files a/gen/ui/buttonSave.png and /dev/null differ
diff --git a/gen/ui/buttonSearch.png b/gen/ui/buttonSearch.png
deleted file mode 100644
index 12f4fb8..0000000
Binary files a/gen/ui/buttonSearch.png and /dev/null differ
diff --git a/gen/ui/buttonTransition.png b/gen/ui/buttonTransition.png
deleted file mode 100644
index 966e394..0000000
Binary files a/gen/ui/buttonTransition.png and /dev/null differ
diff --git a/gen/ui/cancel.png b/gen/ui/cancel.png
index cb7ffc7..57357b8 100644
Binary files a/gen/ui/cancel.png and b/gen/ui/cancel.png differ
diff --git a/gen/ui/deleteMany.png b/gen/ui/deleteMany.png
index 6d23f2d..1c01cd7 100644
Binary files a/gen/ui/deleteMany.png and b/gen/ui/deleteMany.png differ
diff --git a/gen/ui/fake.png b/gen/ui/fake.png
new file mode 100644
index 0000000..594c200
Binary files /dev/null and b/gen/ui/fake.png differ
diff --git a/gen/ui/linkMany.png b/gen/ui/linkMany.png
index 8b2b1c0..1082de7 100644
Binary files a/gen/ui/linkMany.png and b/gen/ui/linkMany.png differ
diff --git a/gen/ui/next.png b/gen/ui/next.png
new file mode 100644
index 0000000..d2c3c2c
Binary files /dev/null and b/gen/ui/next.png differ
diff --git a/gen/ui/previous.png b/gen/ui/previous.png
new file mode 100644
index 0000000..f547183
Binary files /dev/null and b/gen/ui/previous.png differ
diff --git a/gen/ui/save.png b/gen/ui/save.png
new file mode 100644
index 0000000..d20f1c5
Binary files /dev/null and b/gen/ui/save.png differ
diff --git a/gen/ui/search.gif b/gen/ui/search.gif
deleted file mode 100644
index c08147e..0000000
Binary files a/gen/ui/search.gif and /dev/null differ
diff --git a/gen/ui/transition.png b/gen/ui/transition.png
new file mode 100644
index 0000000..6614062
Binary files /dev/null and b/gen/ui/transition.png differ
diff --git a/gen/ui/unlinkMany.png b/gen/ui/unlinkMany.png
index 07c4ad9..cc809b2 100644
Binary files a/gen/ui/unlinkMany.png and b/gen/ui/unlinkMany.png differ
diff --git a/gen/ui/unlinkManyUp.png b/gen/ui/unlinkManyUp.png
index 1bdc8b3..7252c23 100644
Binary files a/gen/ui/unlinkManyUp.png and b/gen/ui/unlinkManyUp.png differ
diff --git a/gen/wrappers/ToolWrapper.py b/gen/wrappers/ToolWrapper.py
index 7be81cf..1cb057a 100644
--- a/gen/wrappers/ToolWrapper.py
+++ b/gen/wrappers/ToolWrapper.py
@@ -192,7 +192,9 @@ class ToolWrapper(AbstractWrapper):
          <!-- Create a new object from a web form. -->
          <input type="button" class="button"
                 if="mayCreate and ('form' in createMeans)"
-                style=":url('buttonAdd', bg=True)" value=":_('query_create')"
+                var2="label=_('query_create')" value=":label"
+                style=":'%s; %s' % (url('add', bg=True), \
+                                    ztool.getButtonWidth(label))"
                 onclick=":'goto(%s)' % \
                     q('%s/do?action=Create&amp;className=%s' % \
                     (toolUrl, className))"/>
@@ -209,7 +211,7 @@ class ToolWrapper(AbstractWrapper):
             <td><input type="text" size="14" name="w_SearchableText"
                        class="inputSearch"/></td>
             <td>
-             <input type="image" class="clickable" src=":url('search.gif')"
+             <input type="image" class="clickable" src=":url('search')"
                     title=":_('search_button')"/></td>
            </tr>
           </table>
@@ -521,8 +523,10 @@ class ToolWrapper(AbstractWrapper):
 
        <!-- Submit button -->
        <p align=":dright"><br/>
-        <input type="submit" class="button" value=":_('search_button')"
-               style=":url('buttonSearch', bg=True)"/>
+        <input type="submit" class="button" var="label=_('search_button')"
+               value=":label"
+               style=":'%s; %s' % (url('search', bg=True), \
+                                   ztool.getButtonWidth(label))"/>
        </p>
       </form>
      </x>''', template=AbstractWrapper.pxTemplate, hook='content')
diff --git a/gen/wrappers/__init__.py b/gen/wrappers/__init__.py
index 7427c73..a8b1889 100644
--- a/gen/wrappers/__init__.py
+++ b/gen/wrappers/__init__.py
@@ -370,7 +370,7 @@ class AbstractWrapper(object):
       <!-- Input field for storing the comment coming from the popup -->
       <textarea id="comment" name="comment" cols="30" rows="3"
                 style="display:none"></textarea>
-      <table>
+      <table cellpadding="0" cellspacing="0">
        <tr valign="middle">
         <td align=":dright" for="transition in transitions">
          <!-- Render a transition or a group of transitions. -->
@@ -448,31 +448,36 @@ class AbstractWrapper(object):
                  pageInfo=phaseObj.pagesInfo[page]">
       <tr valign="top">
        <!-- Previous -->
-       <td if="previousPage and pageInfo.showPrevious">
+       <td if="previousPage and pageInfo.showPrevious"
+           var2="label=_('page_previous');
+                 buttonWidth=ztool.getButtonWidth(label)">
         <!-- Button on the edit page -->
         <x if="isEdit">
-         <input type="button" class="button" value=":_('page_previous')"
+         <input type="button" class="button" value=":label"
                 onClick="submitAppyForm('previous')"
-                style=":url('buttonPrevious', bg=True)"/>
+                style=":'%s; %s' % (url('previous', bg=True), buttonWidth)"/>
          <input type="hidden" name="previousPage" value=":previousPage"/>
         </x>
         <!-- Button on the view page -->
-        <input if="not isEdit" type="button" class="button"
-               value=":_('page_previous')"
-               style=":url('buttonPrevious', bg=True)"
+        <input if="not isEdit" type="button" class="button" value=":label"
+               style=":'%s; %s' % (url('previous', bg=True), buttonWidth)"
                onclick=":'goto(%s)' % q(zobj.getUrl(page=previousPage))"/>
        </td>
 
        <!-- Save -->
        <td if="isEdit and pageInfo.showSave">
         <input type="button" class="button" onClick="submitAppyForm('save')"
-               style=":url('buttonSave', bg=True)" value=":_('object_save')"/>
+               var="label=_('object_save')" value=":label"
+               style=":'%s; %s' % (url('save', bg=True), \
+                                   ztool.getButtonWidth(label))" />
        </td>
 
        <!-- Cancel -->
        <td if="isEdit and pageInfo.showCancel">
         <input type="button" class="button" onClick="submitAppyForm('cancel')"
-             style=":url('buttonCancel', bg=True)" value=":_('object_cancel')"/>
+               var="label=_('object_cancel')" value=":label"
+               style=":'%s; %s' % (url('cancel', bg=True), \
+                                   ztool.getButtonWidth(label))"/>
        </td>
 
        <td if="not isEdit"
@@ -482,7 +487,9 @@ class AbstractWrapper(object):
 
         <!-- Edit -->
         <input type="button" class="button" if="editable and not locked"
-               style=":url('buttonEdit', bg=True)" value=":_('object_edit')"
+               var="label=_('object_edit')" value=":label"
+               style=":'%s; %s' % (url('edit', bg=True), \
+                                   ztool.getButtonWidth(label))"
                onclick=":'goto(%s)' % q(zobj.getUrl(mode='edit', page=page))"/>
 
         <!-- Locked -->
@@ -496,20 +503,23 @@ class AbstractWrapper(object):
         <a if="editable and locked and user.has_role('Manager')">
          <img class="clickable" title=":_('page_unlock')"
               src=":url('unlockBig')"
-              onclick=":'onUnlockPage(%s,%s)' % (q(zobj.UID()), q(page))"/></a>
+              onclick=":'onUnlockPage(%s,%s)' % (q(zobj.id), q(page))"/></a>
        </td>
 
        <!-- Next -->
-       <td if="nextPage and pageInfo.showNext">
+       <td if="nextPage and pageInfo.showNext"
+           var2="label=_('page_next');
+                 buttonWidth=ztool.getButtonWidth(label)">
         <!-- Button on the edit page -->
         <x if="isEdit">
          <input type="button" class="button" onClick="submitAppyForm('next')"
-                style=":url('buttonNext', bg=True)" value=":_('page_next')"/>
+                style=":'%s; %s' % (url('next', bg=True), buttonWidth)"
+                value=":label"/>
          <input type="hidden" name="nextPage" value=":nextPage"/>
         </x>
         <!-- Button on the view page -->
-        <input if="not isEdit" type="button" class="button"
-               style=":url('buttonNext', bg=True)" value=":_('page_next')"
+        <input if="not isEdit" type="button" class="button" value=":label"
+               style=":'%s; %s' % (url('next', bg=True), buttonWidth)"
                onclick=":'goto(%s)' % q(zobj.getUrl(page=nextPage))"/>
        </td>