It seems that ever since I have updated to 2010 I have had trouble saving files. I cannot save any files that are older versions as newer versions. When I close out a drawing and it asks me if I would like to save it, when I click YES it doesnt save. I have to go to File and click Save or press the Save Icon. I have installed service pack 2010 4.0, and the issue was not corrected. Does anyone have any ideas? Thanks.