diff -r 2e52db5cdbde -r ea95004494a2 web/views/navigation.py
--- a/web/views/navigation.py	Thu Jan 20 17:14:28 2011 +0100
+++ b/web/views/navigation.py	Fri Jan 21 11:48:19 2011 +0100
@@ -187,6 +187,7 @@
     """interface for entities which can be linked to a previous and/or next
     entity
     """
+    __needs_bw_compat__ = True
     __regid__ = 'IPrevNext'
     __select__ = implements(IPrevNext, warn=False) # XXX for bw compat, else should be abstract