http://www.macnn.com/articles/10/08/12/imac.patch.corrects.brightness.issues/
Apple updates QuickTime for Windows, iMac display firmware
updated 06:50 pm EDT, Thu August 12, 2010
iMac patch corrects brightness issues
Apple has released an update to its QuickTime player for Windows, along with display firmware for recent iMacs. QuickTime 7.6.7 addresses a security vulnerability that could have allowed attackers to gain unauthorized access to a computer using a maliciously crafted movie file. The issue is said to only affect Windows machines.
The iMac display firmware addresses an issue with LCD brightness. The patch is geared for 21.5-inch iMacs first introduced last month.
Both updates can be downloaded directly from Apple's support page or via Software Update.
