You've probably already seen that Apple released a Mac OS X update and that it fixes 20-plus security problems in the operating system. These are, of course, good things. However, InformationWeek reported Tuesday afternoon the update is crashing many users' computers and leaving them with the infamous "blue screen of death."

Writer Paul McDougall quotes a user called Davald this way:

The latest version of Leopard (10.5.6) downloaded automatically via Software Update. However, when I attempted to install, the process hangs on 'configuring setup.'

Other users pointed out that the problem was affecting other devices in addition to Macs, including Bluetooth connections.

To Apple's credit, the company did warn users to proceed with the update "with caution," noting that they could experience difficulty if they had modified their copies of OS X 10.5 or if they had "moved applications from their default locations."