Those who plan to upgrade to Apple's new OS X Leopard may need this heads-up: quite a number of people who upgraded to Leopard last Friday experienced quite an alarming blue screen of death after successfully installing Leopard and rebooting their Macs. Almost all users who reported experiencing the problem said that they chose the default "Upgrade" option.

Some people tried reinstalling the OS via the "Archive and Install" option, and successfully got rid of the blue screen of death. Other users who opted to wait it out had to wait from more than one up to three hours before the blue screen disappeared.

Apple reportedly blamed the APE (Application Enhancer) by Unsanity LLC included in the OS as the culprit. Unsanity, on the other hand, blamed the spread of a bogus fix that prompted users to manually delete APE through Unix.

Certainly a rough launch for Apple's much awaited OS upgrade. Will this problem get fixed soon? Do stay tuned to find out.