diff --git a/tailbone/forms/core.py b/tailbone/forms/core.py
index a6795c24..e8bc369f 100644
--- a/tailbone/forms/core.py
+++ b/tailbone/forms/core.py
@@ -714,8 +714,8 @@ class Form(object):
     def render_field_readonly(self, field_name, **kwargs):
         label = HTML.tag('label', self.get_label(field_name), for_=field_name)
         field = self.render_field_value(field_name) or ''
-        field_div = HTML.tag('div', class_='field', c=field)
-        return HTML.tag('div', class_='field-wrapper {}'.format(field_name), c=label + field_div)
+        field_div = HTML.tag('div', class_='field', c=[field])
+        return HTML.tag('div', class_='field-wrapper {}'.format(field_name), c=[label, field_div])
 
     def render_field_value(self, field_name):
         record = self.model_instance
diff --git a/tailbone/forms/widgets.py b/tailbone/forms/widgets.py
index 666d9f41..d0b13f22 100644
--- a/tailbone/forms/widgets.py
+++ b/tailbone/forms/widgets.py
@@ -83,6 +83,7 @@ class JQueryDateWidget(dfwidget.DateInputWidget):
         )
         options.update(kw.get('extra_options', {}))
         kw.setdefault('options_json', json.dumps(options))
+        kw.setdefault('selected_callback', None)
         values = self.get_template_values(field, cstruct, kw)
         return field.renderer(template, **values)
 
diff --git a/tailbone/grids/core.py b/tailbone/grids/core.py
index 41b13a71..60374577 100644
--- a/tailbone/grids/core.py
+++ b/tailbone/grids/core.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2017 Lance Edgar
+#  Copyright © 2010-2018 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -27,7 +27,7 @@ Core Grid Classes
 from __future__ import unicode_literals, absolute_import
 
 import datetime
-import urllib
+from six.moves import urllib
 
 import six
 import sqlalchemy as sa
@@ -911,8 +911,12 @@ class Grid(object):
         """
         Returns the rendered contents of the 'actions' column for a given row.
         """
-        main_actions = filter(None, [self.render_action(a, row, i) for a in self.main_actions])
-        more_actions = filter(None, [self.render_action(a, row, i) for a in self.more_actions])
+        main_actions = [self.render_action(a, row, i)
+                        for a in self.main_actions]
+        main_actions = [a for a in main_actions if a]
+        more_actions = [self.render_action(a, row, i)
+                        for a in self.more_actions]
+        more_actions = [a for a in more_actions if a]
         if more_actions:
             icon = HTML.tag('span', class_='ui-icon ui-icon-carat-1-e')
             link = tags.link_to("More" + icon, '#', class_='more')
@@ -1072,5 +1076,5 @@ class URLMaker(object):
         params = self.request.GET.copy()
         params["page"] = page
         params["partial"] = "1"
-        qs = urllib.urlencode(params, True)
+        qs = urllib.parse.urlencode(params, True)
         return '{}?{}'.format(self.request.path, qs)
diff --git a/tailbone/grids/filters.py b/tailbone/grids/filters.py
index 8ae73456..37719275 100644
--- a/tailbone/grids/filters.py
+++ b/tailbone/grids/filters.py
@@ -773,4 +773,4 @@ class GridFiltersForm(forms.Form):
         """
         style = 'display: none;' if filtr.verb in filtr.valueless_verbs else None
         return HTML.tag('div', class_='value', style=style,
-                        c=filtr.render_value(**kwargs))
+                        c=[filtr.render_value(**kwargs)])
diff --git a/tailbone/views/master.py b/tailbone/views/master.py
index bce46bdb..8048e3ea 100644
--- a/tailbone/views/master.py
+++ b/tailbone/views/master.py
@@ -216,7 +216,10 @@ class MasterView(View):
 
         # Return grid only, if partial page was requested.
         if self.request.params.get('partial'):
-            self.request.response.content_type = b'text/html'
+            if six.PY3:
+                self.request.response.content_type = 'text/html'
+            else:
+                self.request.response.content_type = b'text/html'
             self.request.response.text = grid.render_grid()
             return self.request.response
 
@@ -1227,9 +1230,16 @@ class MasterView(View):
         response.content_length = os.path.getsize(path)
         content_type = self.download_content_type(path, filename)
         if content_type:
-            response.content_type = six.binary_type(content_type)
-        filename = os.path.basename(path).encode('ascii', 'replace')
-        response.content_disposition = b'attachment; filename={}'.format(filename)
+            if six.PY3:
+                response.content_type = content_type
+            else:
+                response.content_type = six.binary_type(content_type)
+        if six.PY3:
+            filename = os.path.basename(path)
+            response.content_disposition = 'attachment; filename={}'.format(filename)
+        else:
+            filename = os.path.basename(path).encode('ascii', 'replace')
+            response.content_disposition = b'attachment; filename={}'.format(filename)
         return response
 
     def download_content_type(self, path, filename):
diff --git a/tailbone/views/people.py b/tailbone/views/people.py
index 051d19af..0fbacbc9 100644
--- a/tailbone/views/people.py
+++ b/tailbone/views/people.py
@@ -178,7 +178,7 @@ class PeopleView(MasterView):
         for user in users:
             text = user.username
             url = self.request.route_url('users.view', uuid=user.uuid)
-            items.append(HTML.tag('li', c=tags.link_to(text, url)))
+            items.append(HTML.tag('li', c=[tags.link_to(text, url)]))
         if items:
             return HTML.tag('ul', c=items)
         elif self.request.has_perm('users.create'):
diff --git a/tailbone/views/principal.py b/tailbone/views/principal.py
index 23ad27cb..d879c696 100644
--- a/tailbone/views/principal.py
+++ b/tailbone/views/principal.py
@@ -129,8 +129,8 @@ class PermissionsRenderer(Object):
                 if checked:
                     label = perms[key]['label']
                     span = HTML.tag('span', c="[X]" if checked else "[ ]")
-                    inner += HTML.tag('p', class_='perm', c=span + ' ' + label)
+                    inner += HTML.tag('p', class_='perm', c=[span, HTML(' '), label])
                     rendered = True
             if rendered:
-                html += HTML.tag('div', class_='group', c=inner)
+                html += HTML.tag('div', class_='group', c=[inner])
         return html or "(none granted)"
diff --git a/tailbone/views/users.py b/tailbone/views/users.py
index 9be9a2f8..86167de5 100644
--- a/tailbone/views/users.py
+++ b/tailbone/views/users.py
@@ -169,8 +169,11 @@ class UsersView(PrincipalMasterView):
             roles = self.get_possible_roles().all()
             role_values = [(s.uuid, six.text_type(s)) for s in roles]
             f.set_node('roles', colander.Set())
+            size = len(roles)
+            if size < 3:
+                size = 3
             f.set_widget('roles', dfwidget.SelectWidget(multiple=True,
-                                                        size=len(roles),
+                                                        size=size,
                                                         values=role_values))
             if self.editing:
                 f.set_default('roles', [r.uuid for r in user.roles])
@@ -234,7 +237,7 @@ class UsersView(PrincipalMasterView):
         for role in roles:
             text = role.name
             url = self.request.route_url('roles.view', uuid=role.uuid)
-            items.append(HTML.tag('li', c=tags.link_to(text, url)))
+            items.append(HTML.tag('li', c=[tags.link_to(text, url)]))
         return HTML.tag('ul', c=items)
 
     def editable_instance(self, user):