Today, the AIR 3.5 Runtimes and SDK's were updated to address stability and performance issues, in particular the following problems have been addressed:
AIR 188.8.131.520 Runtime for Windows
AIR 184.108.40.2060 Runtime for Macintosh
AIR 220.127.116.110 SDK for Windows
AIR 18.104.22.1680 SDK for Macintosh
For full details on the 3.5 release, please see our release notes.