Hi! http://code.google.com/p/pharo/issues/detail?id=4547 That is a bug entry about the implementors and senders behavior when selecting this or that in different GUIs. So, I think the whole UI has to be rethought (in little steps), and arguing about this is healthy. So, the places where searching implementors and senders today should be: 1) a text editor 2) a message/method list 3) an inspector ? 4) ? 1) In a text editor the behavior is obvious for me :) 2) This is the discussion in the issue. The browser asks about senders/implementors of messages sent in the selected method. The senders/implementors browser just browses again the message. I think that searching the implementors of #something while I'm browsing the implementors of #something has no sense, hehe. But the other behavior (the one in the browser) does not convince me either... 3, 4 and etcetera) I'm not sure about anything, hehe. Cheers, Guille