Yeah, I have also seen a few reports of this since the Mountain
Lion update. I have tracked down the issue to a very esoteric
behavior of the HFS+ filesystem that will be a bit of a challenge
to deal with properly. That is, however, on my to-do list for the
next minor update. For now, you could rename that file to be a bit
shorter, or replace the characters that have diacritical marks to
avoid the errors in CCC.