The second release candidate of Wine 1.6 is now available.
Being in a code freeze now ahead of the Wine 1.6 official release in the coming weeks, no new features are coming but just bug-fixes.
The first release candidate of Wine 1.6 was made last week
and these RCs will continue until Wine 1.6 is in a shape readied for release. If you're not familiar with this upcoming release to run Windows games and applications under OS X and Linux, read about the Wine 1.6 features
In terms of the bug-fixes for Wine 1.6-rc2, they are documented at WineHQ.org