kappa, both issues you were having should be fixed now, please download the latest nightly and confirm when you have time.
Kai, I'm out of ideas for that OSX crash. Will try again tomorrow, but I don't think it's Java 6 related. One random thing you can try is passing -Dorg.lwjgl.macosx.nsloop=NA to the JVM, let me know if that changes anything. Also, is that MacBook running Mavericks or Yosemite?