>I set these properties on the child object, but still have the same behavior.

What is the form's oBizObj and oPrimaryBizObj at save time?

What is the dataenvironment's InitialSelectedAlias and cInitialSelectedAlias?

What is the business object's LPrimaryBizObj, LAutoPrimaryBizObj?

Are you using local or remote views? These all add up to "Does it think it's updating the right cursor?" cause that's about the only thing I see that might cause that behavior.

If all else fails, does recreating the form from scratch show the same problem?