I'm using Excel 2010 (x86/32-bit) on Windows 7 64-bit. I have been suffering from this repainting bug. When I press page down/up, some portion of the sheet doesn't properly updated or repainted.
In the attached image, there are bunch of empty rows. They should be repainted. Only after dragging these areas, they are repainted.
I have installed SP1 and tried to find any hot fixes, but no good result yet. Is there anyone who has this problem?