Sourcesafe/Winforms problem

[guy]

Two of us are working on a Winforms solution (5 projects) and are using VSS,
and VB.NET 2003

with one form, regularly on closing it in design mode, or sometimes on
checking it in, Sourcesafe prompts for to do a check out for edit even though
an edit is not required. it will then not allow a check out Cancel. If the
checkout is allowed then most of the controls, primarily those on tab pages
or panels. drop off the form. The controls still exist but the code that
places them on parent controls has gone.

There is code in both the Closed and Load event handlers that checks
DesignMode to ensure no code is run at design time.

This form, like the others in the project inherit from the same base form
but we do not have a problem with the other forms

Any ideas as to what else we can check?

guy