-O1 and -O2 were previously disabled with some more imcc options. I enabled and fixed all of them. Even -O2 is now stable.
dukeleto: Happy to announce that @parrotvm will be mentoring students in #gsoc again this year! If you know awesome CS students, send them to me :)
We need mentors to sign up at http://www.google-melange.com/gsoc/org/google/gsoc2013/parrot and project ideas to be collected/edited/reviewed at the "Ideas page".