Microsoft has released CU1 for SQL Server 2012 RTM within 3 weeks of the initial release of the product, which has more than 50 fixes! This is something really interesting to me which I’ve never seen(at least I don’t remember) where they had fixes for ~50 bugs in a Cumulative Update(not Service Pack).
You can get more details(what got fixed what are the enhancements) and download from http://support.microsoft.com/kb/2679368
Cheers!!
MSSQLTREK 