problem with forum.module with postgresql v7.4.1

i found a problem with forum.module that causes a critical error with postgresql (v7.4.1). basically the IF function appears in two sql statements with non-boolean arg types... pgsql v7.4.1 is strict about boolean type casting, so it fails to execute the full query.

is there a forum.module developer out there? if i can get a bit of help with the code semantics, i should be able to fix the problem.

thanks,
aaron