Philippe I can understand your frustration but been more negative than necessary does not help at all. first there is trust in what we are building. second there are humans = us. So when you forget that people are human beings you are losing something important. third there is positive energy. (how many times did we thanks esteban for his unpaied work on the vm we all use?) Thanks esteban for your great effort on the vm. fourth you can bash us if it makes you feel better, now I think that you have certainly better to do because I learned with time (getting wise probably) that it is better for my own soul to focus on good energy. Now consider that you can damage us more than useful or necessary. five let me repeat again: We are working hard, hard, hard and harder to deliver something good but shit can happen. We will improve the quality control of VM. Other people are right. My mac crash regularly on me. I lose regularly code, text, emails to the point that I thought that Pharo is quite more stable than my mac considering all the brain surgery I'm doing on it. Do you imagine that this bug is probably a vm bug due to a strange interaction with the OS version and some funky libraries? six we are aware that the more pharo will evolve the more people will have high expectations on it (no need to be sarcastic on that sentence) and the less we will have a chance to move it. But we will and we will make mistakes and learn from them. If we do not accept errors then better do nothing and watch TV. But I do not like watching TV so I will continue to be stupid and make mistakes. Sorry to not be smart enough. six