BackTrack 5 R2 with new kernel has arrived today, and it's now available the fresh ISO image or upgrade for R1 version from BackTrack repositories.
BackTrack 5 R2 will provide a more stable and complete penetration testing environment than ever before.
Kernel updated to 3.2.6 and includes the relevant injection patches.
Best wireless support.
A huge array of new and updated tools and security fixes
Metasploit 4.2.0 Community Edition
Maltego 3.1.0 special BackTrack edition
Social Engineer Toolkit version 3.0
Majour bug fixes, and also numerous package updates and the addition of 42 new tools and scripts.
For more information and download, you can refer to BackTrack-linux.org