Mac OS 10.6 (Snow Leopard) Know Issue with Guest Account and Loss of Home FolderArchived
ITServices is currently investigating:
Be aware that Snow Leopard seems to have a problem with how guest accounts are handled on systems that had them enabled before upgrading from Leopard. A number of users have reported that their home folders have been deleted after logging into Guest Accounts. Please review this link for details: http://reviews.cnet.com/8301-13727_7-10356505-263.html
We strongly recommend all users follow safe backup procedures to avoid loss of data, not only to protect against this issue, but as best practice.
More information will be posted when Apple provides more details.