Office 2010 applications may experience various issues including crashing and syncing issues with OneDrive if a pre-release version of Office 2010 is installed.
In some cases, the public Beta versions of Office 2010 did not expire. Users who still have the Office 2010 Beta installed do not have the latest fixes.
Users who have a pre-release version of Office 2010 installed should uninstall the Beta and install the production version. See http://support.microsoft.com/kb/290301 for instructions on how to uninstall Office 2010.
The Office 2010 Beta version is 14.0.4734.1000 . Production versions will be 14.0.4763.1000 or later.