Reply #15: Here's what the rules say:

[AndrewClarke]

Disputed ballots may be settled as they arise by the board or by a
majority of the employees designated as teams, if so delegated by the
board.
. . .
Ballot cards must be inspected for hanging chad attached by one or two
corners, mutilations, and other invalidities. If a chad is attached by three
or four corners, a vote shall not be counted for that particular candidate,
question or issue.
. . .
Over-votes and blank ballots may be separated from the stack at this
time and placed at the top of the stack after the header cards.

It seems to me that they will inspect the ballots for over- and undervotes, but that will be counted by machine just like the other ballots.

The complete rules are here: http://www.sos.state.oh.us/sos/news/guide/recount.pdf