Simon,
Do you mean run the form or open it in the designer? If it's the first then you have some code somewhere causing it. If it's the second check to see if your pageframe is a pixel or two too big, or you have a control too close to the edge of the pageframe.
>Just a quick one. I've got a form with a page frame and loads of controls. When I open it to check values etc and not make changes, on closing it it says, do I want to save the changes! Is this normal behaviour, or is there something corrupted in my form,