[tokuzumi]

I just got a "new" mogul last monday. When I first started texting on it, the backspace key would not work. 1 hour later, it was working just fine. Haven't had an issue since. I don't believe it would be a software issue in your case...it's probably hardware. The cable may be frayed in certain places, preventing certain keys from functioning all the time. The keyboard worked perfectly prior to dropping it, correct?