Here's one of those issues: After casting a vote, according to test observers, the Web site played "Hail to the Victors" -- the University of Michigan fight song.
"The integrity of the system had been violated," said Paul Stenbjorn, the board's chief technology officer.
Stenbjorn said a Michigan professor whom the board has been working with on the project had "unleashed his students" during the test period, and one succeeded in infiltrating the system.
The fight song is a symptom of deeper vulnerabilities, says Jeremy Epstein, a computer scientist working with the Common Cause good-government nonprofit on online voting issues. "In order to do that, they had to be able to change anything they wanted on the Web site," Epstein said.