Windows XP SP2, Windows Vista, Windows 7 and Mac OS X Leopard users that have been experiencing issues with QuickTime recently will be happy to know Apple has released the QuickTime 7.6.6 update. The update addresses a few specific issues users have been having with h.263 content playback as well as a number of other “general reliability improvements”. There are also 16 security fixes included. For Mac OS X users, the update was already included in the Mac OS X 10.6.3 update, so no need to worry if its not showing up in Software Update.
Get the QuickTime 7.6.6 Update here