This works on Plone 4.1 site now

buildout.cfg

@@ -1,24 +1,30 @@
 [buildout]
 develop = . 
-parts = scripts test
+parts = scripts instance test
 versions = versions
 extends = 
-    http://dist.plone.org/release/4.0.1/versions.cfg
-    http://good-py.appspot.com/release/dexterity/1.0b1?plone=4.0.1
+    http://good-py.appspot.com/release/plone.app.theming/1.0b9
+    http://good-py.appspot.com/release/dexterity/1.2?plone=4.1.4
 
 [versions]
 
 [scripts]
 recipe = zc.recipe.egg
 eggs = 
     collective.facebookcomments
-    zest.releaser
-    ZopeSkel
-    PasteScript
-    PasteDeploy
-    Paste
     zopeskel.dexterity
 
+[instance]
+recipe = plone.recipe.zope2instance
+user = admin:password
+http-address = 8080
+
+eggs = 
+    Plone
+    collective.facebookcomments
+
+zcml =
+
 [test]
 recipe = zc.recipe.testrunner
 defaults = ['--tests-pattern', '^f?tests$', '-v']

collective/facebookcomments/facebook_comments.pt

@@ -8,5 +8,5 @@
   fjs.parentNode.insertBefore(js, fjs);
 }(document, 'script', 'facebook-jssdk'));</script>
 
-<div class="fb-comments" tal:attributes="data-href here/absolute_url" data-num-posts="2" data-width="500"></div>
+<div class="fb-comments" tal:attributes="data-href view/url" data-num-posts="2" data-width="725"></div>
 </tal:block>

collective/facebookcomments/viewlets.py

@@ -26,7 +26,14 @@ def update(self):
         pass
 
     def available(self):
-        return self.context.portal_type in self.settings.portal_types
+        return self.settings.portal_types and self.context.portal_type in self.settings.portal_types
+
+    def url(self):
+        url1 = self.context.absolute_url()
+        if not url1.endswith('/view'):
+            url1 += '/view'
+        url1 = url1.replace('image_', 'leadImage_')
+        return url1
 
     render = ViewPageTemplateFile("facebook_comments.pt")
 

collective/facebookcomments/vocabularies.py

@@ -12,7 +12,7 @@
 __docformat__ = "epytext"
 
 from Acquisition import aq_inner
-from zope.app.component.hooks import getSite
+from zope.site.hooks import getSite
 from zope.schema.vocabulary import SimpleVocabulary, SimpleTerm
 from Products.CMFCore.utils import getToolByName
 

setup.py

@@ -34,7 +34,6 @@
       [z3c.autoinclude.plugin]
       target = plone
       """,
-      setup_requires=["PasteScript"],
       paster_plugins = ["ZopeSkel"],
 
       )