Apple has posted an update for QuickTime, bringing it to version 7.4.1. The update is available for Leopard, Tiger, Panther and Windows.

QuickTime 7.4.1 [Array]:

QuickTime 7.4.1 addresses security issues and improves compatibility with third-party applications.
This release is recommended for all QuickTime 7 users.

For detailed information on the security content of this update, please visit this website: http://www.info.apple.com/kbnum/n61798.

It weights 58.5MB and it's available either from the Software Update utility or through Apple's support web site [1].

Apple has posted a few other updates this week and is still expected to release a revision update for Mac OS X Leopard in the coming days.