It usually results in some other effect. I'd try turning off FLASH HARDWARE ACCELERATION first since that's a common workaround to such issues.

Let me know if you can't find the instruction on that.

I have a 4004 and can test the video there if you like. Supply a link for me and I can try it at the office on a few netbooks. We use these as test beds to see if our software can run on outdated gear.