Apple users are fuming about a bug in Mac OS X Snow Leopard that deletes data when they log into a guest account on their Macs, judging by the rapid growth in the number of complaints on Apple’s user forums. The data-eating bug was first reported a month ago, shortly after Apple released Snow Leopard in August. Users who logged into a guest account first and then into a regular account found all their data missing and their accounts completely reset. The guest account lets people other than a Mac’s owner use the computer with limited privileges.