I've never seen anything like this, but...
There's a link on this page to contact MS online or by phone:
http://support.microsoft.com/
Carl Erik Torp wrote:
I have made a protected Add-In which supports my
workbooks. Everything works perfectly, but when Excel is
closed with the Visual Basic Editor being inactive, the
Add-In Password dialog pops up and has to be canceled 12
times before it vanish. I believe it is a bug in Excel
2002.
I got two questions. Does anyone know how to get in touch
with Microsoft to ask about such problems? Does anyone
know a workaround to avoid that useless request for a
password when Excel is closing down?
--
Dave Peterson