There is a new hotfix in town, it contains the following fixes :
When setting Outlook client to ‘Work Offline’, archived and non-archived email are unable to be deleted using keystrokes (2201036)
Installer issue causes virtual vault to disappear when performing an interactive client install (2239206)
After installing Outlook 2010 extensions users get an error about running out of sessions while browsing Public Folders and their access stops. (2195812)
Outlook 2010 crashes when opening search folders in new window (2226478)
VV deselected after upgrade to 9.0.1 client (2222788)
Manual archive in Outlook fails with pop-up error "You cannot archive items from this location". (2245419)
The build number for this fix is : 9.0.1 1090. The original 9.0.1 client is 1073.