I wanted to draw the attention to

http://code.google.com/p/pharo/issues/detail?id=3396

The system change notification service is kind of critical for everything.

Any idea why it doesn't work anymore in the latest system?

Lukas do you know the latest version in which it worked. I fixed yesterday something in RecentList but it should not be the cause of the problem. I started to work on fixing tests and I noticed that one MC test is not working for marking dirty package. I did not have the time to dive into it. Stef