Hi, I'm on latest Pharo 3 trying to display items in a list with multiple selection, and do something when the selection changes. So I did a try with NewListModel. The first I explored were the arguments passed to #whenSelectedIndexChanged:. I think they only inform about the last index selected but not about the multiple selection. So I decided to ask the list its #selectedItems, but the answer was not what I expected also. I'm not sure this is a bug to report or if I'm doing something wrong. I'll appreciate any help. Steps to reproduce: a) do it: me := NewListModel new. me items: (1 to: 2); beMultipleSelection; whenSelectedIndexChanged: [ self logCr: me selectedItems ]. me openWithSpec. => in Transcript I see: b) after a click on 1: #() c) after a shift+click on 2: #(1) d) inspecting "me selectedItems" ---> #(1 2) So, result in d) is fine but not b) and c). Thanks in advance, MartÃn PS: Before this, I tried to use a TreeModel and I found the issue discussed in"[Pharo-dev] [Spec] whenSelectedItemsChanged: on TreeModel".