Can anyone shed some light on this error? I get it sporadically and it doesn't seem to be a big deal, but still thought I'd post it for teh lulz.

divide by zero
divide by zero
while executing
"expr -abs(0)/0"
invoked from within
"pdtk_canvas_scroll .x123bc60.c y [expr -abs(0)/0]"
(command bound to event)

Here is an analogy on the issue of 'divide by zero' once provided to me that may help you discover the cause of your problem:

If you are dividing zero by something It is completely allowed; to take two halves of zero. The answer is zero. Say you have zero apples. You split your zero apples between Alice and Bob. Alice and Bob now both have zero apples.

But, you cannot divide by zero. Say you have two apples. Now, you want to give these apples to zero people. How many apples does each person get? The answer is undefined, and so division by zero is impossible.