If you have been using Flex 3.5, you might want to upgrade to Flex 3.5a. Yes, the ‘a’ after 3.5 is not a typo. The Flex 3.5 build has been updated to address an issue with Flex-based AIR auto-update UI packaged within the SDK. The related JIRA bug for issue is http://bugs.adobe.com/jira/browse/SDK-24766
All developers . . . → Read More: New and Improved Flex 3.5 build