>Another possibility is if you have some of the windows - errormessages etc - pulled out of the IDE and off on another monitor - especaiolly if you have another instance if the VS IDE open at the same time. This is a known bug and I think there may be a hotfix at MSDN ( don't know if this was fixed in VS2010 sp 1 and I think it is more of an issue in VB than C#.
I only have one monitor but thanks for the information.