Firefox 4 and flickering in some flash sites

Hello all

Having an issue with Firefox 4 and horrible flickering and distortion in some flash sites, esp Facebook games.

This is not an issue in 11.3 and FF 3.6.
Issue is present in 11.4 with FF4
Issue is present in 11.3 if I upgrade to FF4 and disappears if I downgrade to FF3.6
Issue is not present in Windows and FF4.

It’s a known issue

The current fix is:
Firefox on openSUSE 11.4 plays film clips badly