The election was likely marked by a lot of voter fraud, but that involved questionable voter registrations and felons voting illegally. There was no "fraud" in the recount process. Coleman was ahead by several hundred votes when the polls closed on Election Day and the initial ballot count was completed, but there were about 1,500 ballots that had been disqualified or contested that still had to be examined carefully before a final determination could be made about their status. Most of those ballots were counted as legitimate votes, and that's what put Franken over the top.
There are no "new ballots" found in closets or car trunks after Election Day that end up getting included in a recount. That's a silly myth that has been posted here repeatedly on FR over the last few days.
FYI I found mention from a WI site that there are about 730 rejected provisionals in WI. No county specificity mentioned.