>Subsquent to my earlier post, I have found that if I create a new pageframe sub-class based on my existing pageframe subclass with absolutely no changes and base the pageframe at the form level on that subclass and the contained pageframes on its parent-class, the problem solves itself.
>
>That is very weird.
>
>So, I have a workaround, but would love to know why I had to do this.

this is a bug.