Machine malfunctions disenfranchised voters when they froze instead of accepting the access code entered by the voters.*

"It looked like a couple of older guys were still voting when the computer screens completely shut down," said Cam Sanders, an Arlington teacher. "I think they were talking about whether their votes were lost."

In Fort Worth on Tuesday, Singer said his wife and their friend waited nearly 1-1/2 hours to vote at the Southwest Subcourthouse. But when their friend punched in the access code, he said, the machine froze.

Singer said their friend was not given another chance to vote.

"I'm concerned because I wonder how many others were treated that way," he said.