If you select items in the item master in Vault Professional you may get this error message:
"Error 1405: Item version identified incorrectly. Please refresh and try again."
On the client try to delete/rename the file WorkingFolders.xml on your workstation.
You usually find this file under:
C:\Users\[YourUserID] \AppData\Roaming\Autodesk\VaultCommon\Servers\Services_Security_6_29_2011\localhost\Vaults\<YourVault>\Objects