Interesting note about AS3 projects in Flex Builder
I created an AS3 project in Flex yesterday and when trying to us an ArrayCollection I was unable to import mx.collections.ArrayCollection. I asked my Flex Guru co-worker Mike for help and he quickly discovered that Flex doesn't add the library path to the Framework.swc file by default when creating an ActionScript 3 project. After adding in ${FRAMEWORKS}\libs\framework.swc to the library path I was fine.
