Having the same problems here, with Mac OSX Mavericks, Arduino UNO and the 1.0.5 IDE.
My MacBook also crashed during compilation (without uploading), so I doubt that the compiler causes the trouble, not the uploader. Anyway, the error-report, which is shown after restart, is not very helpful at all…
By the look of it, the error doesn't seem to be reproducible. I'm trying to narrow down the problem, perhaps I can figure out something.