Earlier today, we reported in our daily news roundup that owners of 24-inch iMacs were having screen lockup problems. Apple is aware of the problem, and according to an Apple representative, the company is working on a fix.

"A small number of iMac users have made us aware that a recent software update issued by Apple can sometimes cause their iMacs to freeze, requiring them to restart their iMac," the Apple spokesperson said in a statement to Mac|Life. "We are tracking down the root cause of this bug, and will issue a software update which corrects it as soon as we can–most likely later this month. We apologize for the inconvenience."

The screen lockup problem affects iMacs that have installed the iMac Software Update 1.1 that was released on September 13. According to Apple's Web site, the update "provides important bug fixes."