Electronic Voting Security Concerns

I've not posted before on electronic voting machine issues, but this is just outright scary:

Upon examining the inner workings of one of the most popular paperless touch screen voting machines used in public elections in the United States, it has been determined that with the flip of a single switch inside, the machine can behave in a completely different manner compared to the tested and certified version.

With such strong incentives to cheat on voting, it would seem that having a clearly verifiable voting process would be something we'd want to have. But, hey, just trusting everyone not to tamper with machines... that could work too. Yikes.

(H/T to /.)