I may be misremembering, but was there a presidential election in which there was a dispute over one state's votes, so the number of votes that state could cast was reduced? I feel like this didn't end up affecting the results and was effectively a piece of trivia. It wasn't an unfaithful elector (as with DC in 2000).
The closest that I could find was Nevada in 1864, which only had 2 electoral votes because one of its electors didn't cast a vote (apparently he was snowed in). Here's a link to that:
http://www.270towin.com/states/Nevada
