Hmm, a weird thing happens when I was trying to compile Flex 3 applications with haXe. I was getting a lot of errors of the form:
Field systemManager has different property access than in mx.managers.IFocusManagerContainer (default should be null)
What worked for me was going into
/usr/lib/haxe/lib/flex/1,2/mx
and editting the files so that I removed most of the
(default,null)
instances. Not sure what the problem was here, but things seem to work now.