Don't know if anyone else is getting this issue, but as I just spent hours figuring it out I thought I'd share.
Installing SDK 4.5.0 into Flex Builder 3 killed my code completion for all flash.* packages - not really something I could work with for long. After much experimenting and googling I dug up this: http://forums.adobe.com/thread/559312?tstart=0 You will of course have to use the most recent playerglobal.swc from http://labs.adobe.com/downloads/flashplatformruntimes_incubator.html The problem affects Flash Builder 2 and earlier as far as I can tell - so I don't know why more peeps aren't getting this. Anyway, the fix is easy so I can get back to work now.
