This week Microsoft posted Update Rollup 15 for download.
The notable new functionality includes improvements to the CRM Outlook Client! This includes “process isolation” to split it out from the core Outlook process, an upgrade to SQL CE 4.0, and reduces performance issues with a large address book (among other things, it’s all in the KB)
Here’s the history of CRM 2011 update rollup version numbers and KB links.
