Hi, I am playing with StartupAction’s. I discovered that the #runOnce: message is apparently not working. Try to put this (https://dl.dropboxusercontent.com/u/6281855/pincopallino.st) StartupAction into ~/Library/Preferences/pharo and open an image. The first time the name is set as expected. Then, change the ‘PincoPallino' name in the pincopallino.st file to another name, save and open another time your image. I think it should change the name again, since #runOnce: is set to false. But it does not. Looking around seems that the StartupLoader handles the preferences in a Dictionary whose keys are names (BAD) and if there is a preference with the same name of an already executed one it does not re-execute even though #runOnce: false. I also put an entry in the tracker: https://pharo.fogbugz.com/f/cases/12594/runOnce-of-StartupAction-not-working Cheers, R