Man, reminds me of my first work project, we rebuilt the time clock in 2006 for our department. I knew about inaccuracies in floating math so I thought I was taking precautions, but in the end my first native PHP float implementation introduced enough drift in just the hours field that we'd lose $40 a year. Rebuilt for the Decimal object and it lasted long enough until the entire organization bought it's own COTS solution.

Now I'm trying to remember if I watched Office Space before or after...