Hi, I'm just testing/porting some of my stuff on pharo 4 (congrats again for the release!) and I see something strange. When I run the examples of agile visualization on a playground I don't get all the tabs that I get on Pharo 3.0 and Moose 5.0 and 5.1, only the "Raw" and "Meta". Tabs like "View" and "Elements" are lost, which are particulary needed when you explore a visualization. To repeat this behaviour, just run any example of agile visualization book on a fresh image of Pharo 4. I'm running Pharo4.0 Latest update: #40611 on an Arch Linux system. Hope it helps, Offray