We have been planning to spread the world about this but things slipped out of radar and we didn't. Autodesk have decided to formally stop supporting Windows Vista in 2012. It will still linger for a litle bit more and if you would like to know more about it as well as to get familiar with reasons behind it please see a following link:
http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=18424371
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