Problem while displaying flash

[Shrikant]

Hi, 

I am running FC11. 

I have started facing a strange problem recently. Whenever I am accessing 
a web page with flash or media players like xine / VLC, the screen 
distorts and you can not read anything. Once you close the program or 
move to another normal web page the display returns to normal. 

I tried re-installing flash plug-in but the problem remained same. 

can somebody help me to resolve this issue ?

Shrikant