First of all, thank you very much for this app.
Having to use stuffit was one of the major blemishes on my wonderful mac user experience and I'm sure many feel the same.
Don't know if this is Intel chip-related but when I unarchive Japanese files with Japanese encoding, even if I set the confidence level to 100%, it still asks me for confirmation whereas on my PPC iBook it never does and I have it set at 80% as recommended.