hmm, I thought I was the crazy one. I had major troubles with my first dir-655 (green led's). It would reboot and lost it's config settings all the time, but I never did mention this other anomoly I had, which was the same as described here with the crazy characters. It seemed like the firmware was corrupting becasue they would remain even after resetting to fact config and flashing firmware. The replacement I received has not displayed this or any other odd behavior though.