In Bexar Couny, the theory is that voters who rest a hand on the touch screen while voting may inadvertently cast their votes wrong without knowing it.*

"The machine registered the vote from my thumb when I rested my hand on the screen to vote," the reader claims.

The reader says he caught his error on the review screen before finalizing his vote, but he questions whether everyone -- especially new voters -- would do the same.

[Bexar County Elections Administrator Clifford] Borofsky says his office has received only two reports in 60,000 votes cast of votes being registered by individuals inadvertently resting their hand on the voting screen. However, there is no way to know how many people made the mistake without knowing it.