[Bungleau]

Agreed. As a semi-professional programmer, I can tell you that bugs always happen for a reason. There is some pattern of events which allows them to occur, and if the pattern doesn't, they don't happen.

Now, sometimes the pattern can be bizarre (like having the computer fail to ground, which happened in my past), but more often than not, it's a case of a variable left unset or unchanged, or something similar.