This isn't so much of a bug, but there's a few things I've noticed that are a little unattractive. When I receive a message or send one, it comes up as "From" public key rather than ID, and when I reply to a message say 10 times, I see 10 "RE:'s" in the subject line. If I replied 100 times I would probably see 100 RE:'s in the subject line.
Another thing that has already been posted here is when you relaunch Keyhotee, the list or your contacts to the left disappears, and you have to select your contacts again for them to re-appear in the contacts list. I was also able to add myself to the contacts list and send chat messages to myself.
Also I tried adding arcke to my contacts using his ID but Keyhotee failed to find it saying "Unable to find ID". I asked him to send me his ID exactly as he entered it but still nothing. Could this be a bug?