Hi
I have seen things like that before.
First turn off the "Fill" option.
Second, try by using the old graphics engine. I'm pretty sure that option is available in v9.3.
I think you have a problem with the graphics capacity of your system. One option might be Win 7 but that might not be an option for other reasons. Also, are you in a 32 or 64 bit system? My experience is based on 64 bit.
Good luck
Thomas