Registration of the default Zope profile does not seem to work anymore. It is probably due to Plone hot fix from 2011-02-08. Here we have implemented an alternative way to register the profile, which works even with the hotfix.

gen/plone25/installer.py

@@ -621,9 +621,14 @@ class ZopeInstaller:
 
     def finalizeInstallation(self):
         '''Performs some final installation steps.'''
+        cfg = self.config
         # Apply customization policy if any
-        cp = self.config.CustomizationPolicy
+        cp = cfg.CustomizationPolicy
         if cp and hasattr(cp, 'register'): cp.register(context)
+        # Install the default profile
+        cfg.profile_registry.registerProfile(self.productName, self.productName,
+            'Installation of %s' % self.productName, 'profiles/default',
+            self.productName, cfg.EXTENSION, for_=cfg.IPloneSiteRoot)
 
     def install(self):
         self.logger.info('is being installed...')

gen/plone25/templates/config.py

@@ -24,6 +24,7 @@ from Products.CMFCore import utils as cmfutils
 from Products.CMFCore.utils import getToolByName
 from Products.CMFPlone.PloneBatch import Batch
 from Products.CMFPlone.utils import ToolInit
+from Products.CMFPlone.interfaces import IPloneSiteRoot
 from Products.CMFCore import DirectoryView
 from Products.CMFCore.DirectoryView import manage_addDirectoryView
 from Products.DCWorkflow.Transitions import TRIGGER_USER_ACTION
@@ -32,6 +33,7 @@ from Products.Archetypes.Extensions.utils import installTypes
 from Products.Archetypes.Extensions.utils import install_subskin
 from Products.Archetypes.config import TOOL_NAME as ARCHETYPETOOLNAME
 from Products.Archetypes import listTypes, process_types
+from Products.GenericSetup import EXTENSION, profile_registry
 import appy.gen
 import logging
 logger = logging.getLogger('<!applicationName!>')

gen/plone25/templates/configure.zcml

@@ -1,13 +1,6 @@
 <configure xmlns="http://namespaces.zope.org/zope"
            xmlns:browser="http://namespaces.zope.org/browser"
            xmlns:five="http://namespaces.zope.org/five"
-           xmlns:genericsetup="http://namespaces.zope.org/genericsetup"
            i18n_domain="<!applicationName!>">
-
 <!deprecated!>
-<genericsetup:registerProfile name="default"
-    title="<!applicationName!>" description=""
-    provides="Products.GenericSetup.interfaces.EXTENSION"
-    for="Products.CMFPlone.interfaces.IPloneSiteRoot"/>
-
 </configure>