James,
Let me jump in here and see if I can help. I think Roxanne is right and you might want to take a close look at the What's New Guide. Some of the changes in the framework affected some of our existing code.

Are you using the AutoPrimary function or switching the primary business object yourself? Kevin fixed the framework and the form will reset the primary to whatever reference is stored in oPrimaryBizObj. This should happen at only certain times and may not be your problem, but it's a recent fix and it did catch us.

Secondly, are you setting the "Auto Close Tables" flags and the "Auto Open Tables" flags in the business object builder.

I hope this helps,
Bill