Check out the new Maintenance Update for AutoCAD 2010 at http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=13760520&linkID=9240618
Autodesk has recently released a maintenance update for your product. Errors similar to those you have encountered have been resolved and are part of this update. We recommend that you install this maintenance update to update your product, or contact your system administrator.
Well, I hope this fixes some of our issues with AutoCAD 2010!