Bug in Mac OS X Snow Leopard Deleting Users' Accounts
In addition to news of rampant compatibility problems and a quiet admission that even Macs are vulnerable to malware, there is now word that the 10.6 version of OS X was shipped with a bug so severe it could wipe out all of your data. If you upgraded to the latest version, and have yet to log in using the guest account, we suggest you immediately disable said account.
While Apple has yet to admit to the flaw, reports are pouring in from around the Web: logging in with the guest account could delete all of the data associated with the primary account. If you click on the guest account (even accidentally), and the computer hangs, there's a good chance that when you go back and log into your personal account, all of your files will have been devoured by the operating system.
Let's hope that Apple addresses this issue soon. (Snow Leopard is already approaching the two-month mark.) Otherwise, we'll have to start penning open letters to the boys in Cupertino complaining about their consistent failures to fix bugs and plug security holes in a timely fashion. [From: Apple Forums via Engadget]