This has happened to me twice so far, and I haven't been on Chesscube very long. Both times, my opponent disconnected. I got the usual message that if they don't reconnect within 2 minutes they forfeit, but then when the 2 mins ran out, the game didn't end. Instead, I had to wait a while for their timer to run out and then when the timer did finally run out, rather than the normal screen showing the game result, I got an error message. The first time that happened might've been a coincidence, but the second time it occurred, the disconnect happened right after I captured my opponents rook, and at that point I had a pretty much 99% chance of winning, so I was kind of annoyed.
So I'm reporting this bug for 3 reasons:
1) It's pretty frustrating when I have to sit around waiting 10-15 min for my opponent's timer to run out.
2) I didn't get any rating points after the disconnect. (I understand if I won't be able to get those point back, but after my last opponent disconnected immediately after I made a game-deciding move, well, I'm annoyed, to say the least.)
3) I don't believe I got my cubits back after the error. The last game I payed 10 cubits for, I don't remember what the previous one was.
I wish I could upload my screenshot of the error, but it's apparently too large.