Written by the author/researcher, James Q. Jacobs:

"Many votes were counted for the wrong candidate or ballot option, and a significant portion of the cross-voting resulted in Kerry votes tallied as Bush votes. The 2004 Presidential election hinged on the Ohio results. According to exit polls, Kerry won Ohio. Instead, with a -3.35 percent differential in Kerry's tally, the results gave the victory and the presidency to Bush. With these circumstances, evidence of miscounted voting and Kerry-to-Bush vote switching have particular importance in determining the actual intent of Ohio voters, the reasons for the exit poll discrepancy, and the validity of the 2004 US Presidential election result. Cross-voting also impacted other races and analysis of past elections may reveal similar cross-voting patterns.

I present evidence of cross-voting and of how Kerry disproportionately lost votes to cross-voting. I discuss the methods to determine how many votes were miscounted or not counted at all, and where possible, report the impact of cross-voting. The article is divided into sections, beginning with necessary background on how the ballot orders and precinct combinations were organized."

http://jqjacobs.net/politics/ohio.html