Updating to the latest commit causes an array out of bounds exception (3, [0...2]) when the parser encounters an @available directive. This issue was not present in commit 8b6e20f (14 feb 2013, 3 weeks ago).
Should not be very complicated thing, will take a look when I manage to get some time :)
Sorry for late reply - email with notification got "lost" in my inbox somehow...
This seems to be related to #328, closing this request... Am still figuring out the reason.