Hmm I looked at my install and it does not have that file in the Classes. On your page it looks fixed, did you manage to fix it yourself? What was the problem?
Kriesi I am looking at the Version History of the latest download and it shows no changes since June 28, I suppose you made fixes/changes to some files and did not document them. May I suggest to sticky a forum topic on each theme forum index and add changes there. Our theme has been very heavily modified and doing updates takes forever as we have to check all files one by one.