Index: roundup/cgi/templating.py
===================================================================
--- roundup/cgi/templating.py	(revision 4213)
+++ roundup/cgi/templating.py	(working copy)
@@ -1304,6 +1304,8 @@
         item = match.group('item')
         cls = match.group('class').lower()
         id = match.group('id')
+        if int(id) > 2**30: # Avoid Postgres error
+            return item
         try:
             # make sure cls is a valid tracker classname
             cl = self._db.getclass(cls)