I've tried extracting several different RAR files (containing rar, r00, r01 etc.) and the application simply freezes showing a "Preparing to extract..." screen while using 90% of my processor. Moreover, it is impossible to anyhow close or Force Quit the program as it doesn't have the option due to its integration into OS X.

Apart from that, wonderful program, but I hope this problem is solved.

If you have any further questions, e-mail me at rudi[dot]eihenbaums[at]gmail