20116 ----- - Issue 5993: Change in Scrollbar behavior. Thanks Thierry Goubier and Sean De Nigris http://code.google.com/p/pharo/issues/detail?id=5993 - Issue 3423: Debugger little usability enh http://code.google.com/p/pharo/issues/detail?id=3423 - Issue 6019: Collection>>#difference: behaviour change between 1.3 and 1.4 http://code.google.com/p/pharo/issues/detail?id=6019