I'll take every few hours, but I'd prefer "in under 30 minutes".�� Getting warm and fuzzy feelings when trying to prove a negative with something that takes hours to run is very difficult.�� Let's say you have a case which reproduces in 8 hours 50% of the time.�� To reach 99% confidence level in a fix I'd have to run it for 8 * (50 log: 2) hours without seeing it reproduce, right?�� That's nearly 2 days; it could take weeks to fix :-(