Question : Screen Scramble in Excel 2003

I am developing a large complex spreadshet that uses VBA. I have started having problems that at some times when I enter data or change tabs I get a scrambled screen with section of diffentent Tabs shown on the Screen (see atthached). I am using  Application.ScreenUpdating = False (& =True) in the VBA but this has not caused me trouble in the past. This seems to only be a recent problem in a spreadsheet that has worked previously. Does anyone have any suggestion as to were I could possibly look to fix this problem.

Answer : Screen Scramble in Excel 2003

Check and see if you have KB 973475 update applied. If so, remove it as it seems to cause this problem under certain circumstances. There is a similar issue with  KB973593 for 2007.
Regards,
Rory