Yesterday, Microsoft released the cummulativ update pack number 4.
http://support.microsoft.com/kb/2449679
Before you are going to install it, read the corresponding documentation twice.
Also make sure, you follow the steps written in the KB article.
I would recommend to install it at a test environment at first (if you have).
For production environments, wait round about 2 weeks to get the most issues found by the community.
But after that time don’t miss to install the CU4.
Kind regards,
Benedikt
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