Not really a bug, just a quick FYI. It seems the latest version of asdoc (as per Flex 4) chokes and "FATAL ERROR"s on the missing closing P-tags in the header comments for several of the classes, you have to open the log file to see which because the stdout errors don't give enough info.
Not sure why this has started happening, and whether you're experiencing it with asdoc already when you generate for the current builds, but this may start happening. I'm closing these tags manually in my version so I can generate docs for inclusion with my own.