Colin,
I had the same problem. Found out there is a bug in VFP 6.0 if you turn off the Title Bar (TitleBar = 0) it does what you are seeing. I fixed it by simply putting a command in the form init - Thisform.Width = nnn. The init happens last so it works every time even if the titlebar is not your problem.

>I have a form that has a vertical scrollbar. The forms width is set to 695 but after the form is saved and run the width is changing to 672. Any ideas on how to stop this? TIA