i just updated my example ImageViewer application posted at labs.adobe.com. the example now works with flex 2.0 beta 3.
the ImageViewer app is an ActionScript 3 version of the example originally published in Essential ActionScript 2.0.
it's upgrade time! the latest beta version of ActionScript 3, flash player 9, and flex 2.0 are now available for download at labs.adobe.com.
if you've played with the earlier betas, you should definitely upgrade as soon as possible. this version is much closer to release quality, with tons of fixes and much improved, easier to use documentation.