Microsoft has released another rollup for CRM users. Rollup 11 is not as major a rollup as rollup 10, which required that you had at least rollup 7 already applied.
There are no major details in what this Rollup is fixing. However, there are no hotfixes that need to be enabled manually BUT you need to be aware that once you apply this Rollup you may be unable to import customizations from this same instance of CRM where you had exported the customizations on an earlier Rollup. So if you have any customizations you exported for any reason, re-import them now OR as soon as you apply Rollup 11, make a new export and save the customizations somewhere.
Read about Rollup 11 here: http://support.microsoft.com/kb/981328