I have been using Flex Builder for my flex and air programming, but decided to start doing some work in TextMate and compiling from the command line. I downloaded the Open Source Flex 3 sdk and the Adobe Air sdk. The flex sdk executables wouldn't run. After poking around, I discovered the Unix executables had Windows line endings. I used BBEdit to open each file and change the line endings to Unix line endings. BBEdit is nice for this. I think I'll build a little perl app to do this, though.