Hi marcus Try to stop thinking that making errors is bad. This is a christian ideology that may block your way of looking at the world in a open way. You know like "good and bad". (Watch for example Spirit away for example I'm always fascinated by the fact that we are looking for who are the good and bad). Oscar would say "live and learn". Making error is part of life. Period! Being stupid is when - you repeat errors without learning from them. - if you would not take action after. So introducing a bug is NOT A PROBLEM and nobody is stupid. We are dealing with a really complex program. We will do mistakes, many in fact. We may break the system and put it on its knees. But we will learn and fix or rollback. Easy in computer world we clone duplicate. Imagine it you would be a drawer on expensive paper with ink that you cannot erase!! Simple. So marcus dont be stupid to think that people making mistakes are idiots. They are not! You and me are far from stupid and we will do mistakes. For sure and we will learn from them. Pharo is the proof of it :) So do not let you fun gets spoiled by this oversimplistic view on the world. Stef PS: bookmark this mail because this is the last one on that topics.! When you feel idiots read it. PSPS: one young guy at IBM made IBM lost 1 Millions dollars, so he can to see his boss to resign. The boss said no way, we reject this, we invested on you 1 Million dollars. Nice!