Apple is rumoured to be working on an update to the Public Beta, as well as Microsoft working on an update to MSIE 5.5 ( The version included with the Beta ).
Fixes reportedly include a patch to OS X's network code to prevent a possible denial-of-service attack, updated storage drivers to prevent installation problems on certain new Macs, and numerous small changes to the BSD UNIX layer to deal with known multiplatform issues in certain command-line utilities. Some reports suggest that a patch to Microsoft's Internet Explorer for OS X will also be included, but this has not been confirmed.