Update Rollup 11 contains the following fixes and updates:http://www.dynamicsconsulting.de/issues-that-are-resolved-in-update-rollup-11-for-microsoft-dynamics-crm-2011/
When you upgrade an organization from Microsoft Dynamics CRM 4.0 to Microsoft Dynamics CRM 2011, permissions for the SystemForm entities are not assigned correctly.
When you run the Set Regarding function on an email message, the lookup view lists all active accounts. However, you should be able to set a different default view for the lookup.
The WAUTH parameter is not supported...
