Apple has released Mac OS X 10.6.7 for Mac OS X Snow Leopard. This includes general operating system fixes that enhances the stability, compatibility and security of your Mac including :
1) Improve the reliability of Back to My Mac
2)Resolve an issue when transferring files to certain SMB servers
3)Address various minor Mac App Store bugs
For information on the support : http://support.apple.com/kb/HT4472
For information on the security fixes : http://support.apple.com/kb/HT1222
The iPhone Help
The iPhone Help