Strange behaviour

[Simen Haugen]

I just encountered a strange bug that I'm having problems reproducing as a 
test case.

I used an associative array to store some data lengths, and in my code, I 
was accessing an element not in the array. In debug mode, this code did not 
fire ArrayBoundsError and worked (returning 0 I guess), but in release mode 
it crashed. Any ideas why this might have happend?