County Chief Executive Dan Onorato said 50 to 60 precincts,
out of more than 1,300 countywide, ran out of the ballots, which are
given to people who show up to vote but whose names, for whatever
reason, are not on the lists of voters at polling places.
...
The problem seemed most prevalent in Oakland, where University of
Pittsburgh students were voting, the Garfield neighborhood and
Wilkinsburg.
The situation got more complicated this afternoon, when a county judge
issued an order that voters would be allowed to register and vote
provisionally. There were reports that when some of those voters
showed up at places without provisional ballots, they were allowed to
vote using the regular machines, which cannot be tracked.