In postgreSQL 8.3 some implicit casts have been removed.

When DelayedIndexing is enabled in eZ Publish and you try to publish a new version of an object, you get a db transaction error. The error coming from PostgreSQL:

ERROR: operator does not exist: integer = text

...

HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.

Patch attached.