Don,
Thank you for pointing out this interesting occurance. I have certainly passed along the input, as I do all input, in the appropriate manner.

As this is a count down timer, intended to count down to 0, I'm sure the programmers never thought of/were concerned with someone attempting to count down from 0. Of course, if a users wants to count how long he's been running the timer, he would use the count UP function, as counting down into negatives is the same thing. As such, I would certainly not consider this a significant problem with the product, as when used as intended everything operates fine.