Update Rollup 2 for System Center 2012 has been released.

You can fetch the downloads from here (KB2706783)

A stack of fixes, best to visit the link the full descriptions.

Also check out Update Rollup 1 for Microsoft System Center 2012 here (2686249)

There is also a preview SP1 for System Center 2012 called CTP2 (plus documentation), but keep in mind it is not for production use and cannot be upgraded when SP1 is finally released.