The new AMD Catalyst 13.2 Beta 6 for Linux was released this afternoon. No official driver change-log has been made publicly available via AMD but the Linux x86/x86_64 download link can be found within this forum post.
Based upon the timing, the changes I'm aware of that should have landed in this new beta release is proper driver support for UEFI on Ubuntu, early support for Red Hat Enterprise Linux 6.4, and a handful of bug-fixes.
At the end of January was the previous Catalyst Linux update. Last month an updated Catalyst legacy driver was also released for Linux.