Two examples of the problem are on the screenshots at:

Just as a matter of interest, Mike, in RealPlayer have you unchecked "Use XVideo" (Tools > Preferences > Hardware > Driver Options)?

I have a Dell Inspiron 530S desktop with an Nvidia graphics card. The hardware is at http://www.smolts.org/show?UUID=pub_f3670c10-289f-4e85-804b-60babb27fb23 The machine runs F8 fully up to date and has kmod-nvidia installed. The desktop is KDE3.5 Almost everything runs well and without any problems - but for a long time there has been a really awful colour problem when running Real video and Skype. Two examples of the problem are on the screenshots at: http://tinypic.com/view.php?pic=mhvk1t&s=4 http://tinypic.com/view.php?pic=20ggy84&s=4 These were obtained by going to the test page at http://service.real.com/test/ and running the videos - it does not seem to make any difference installing a different version of Realplayer. I have the same setup on a different machine with different hardware and not running kmod-nvidia and there is no problem with colour with the same tests. Flash video on web pages is fine and I am not aware of other colour issues but I have been unable to fathom out how to fix this problem. Does anyone have any hints as to what I may do, or a workaround, or suggestion as to where I might look to fix this?