I just upgraded the Flex SDK to 3.1 and now code completion
for Flash classes is not working (Flex classes still work).
EventDispatcher, Event, Sprite etc doesn't show up when I hit
ctrl+space. What is even more annoying is that the "Remove unused
imports when organizing" feature has also desided that the flash
classes doesn't exist, so the "import flash.*" are removed when I
edit my files, which of course result in compilation errors.