"In the 2000 presidential election, 1.9 million Americans cast ballots that
no one counted. 'Spoiled votes' is the technical term. The pile of ballots
left to rot has a distinctly dark hue: About 1 million of them – half of
the rejected ballots – were cast by African Americans although black voters
make up only 12 percent of the electorate.

This year, it could get worse."

http://sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2004/06/20/ING
2976LG61.DTL

Fyi