DB Object Update Issue - PGSQL

I've come across some bizarre behavior that appeared after upgrading to the latest DB module, and I was wondering if anyone could shed some light on it. When I perform an update, it indicates the keys array is empty, and adds every one of my beans attributes to the where clause, causing the update to fail. What is bizarre about this, is that I have log statements before and after the update occurs that definitively show that the keys array is populated with the correct primary id column name. Any ideas? Thanks! -Theo