We use a custom form for our office contacts public folder (Exchange 2K).
The form contains little code, only some validation stuff.  We've been using
it for at least a couple of years on about 20 PCs, with Outlook 2000, 2002,
and 2003.  I'm having a problem on one newly set up WinXP/Outlook XP
desktop, regardless of who logs in.

When entering data in the custom form, one drop-down list will not hold a
value.  It returns to its default whether another value is selected with the
mouse or the arrow keys.  Since the value in this field validates against
other fields, having the default value often prevents the form from closing.

And, when an existing contact is opened and edited, clicking 'save and
close' triggers the Outlook security warning.  That's something we've never
seen in all the time we've used the form.

I have verified that Outlook and Windows are fully patched, cleared the
forms cache (several times), logged in as different users including admins,
and created new mail profiles.  Nothing has helped, and the behavior is the
same no matter who uses the form or with what profile.

Any suggestions on where to go from here?  TIA.