[Pharo-project] got a surprising behavior

Hi guys I got a really strange behavior: I integrated - Issue 4607: Refactor Debugger >> content:notifying:. Thanks Camillo Bruni. http://code.google.com/p/pharo/issues/detail?id=4607 - Issue 4606: Fix drawing shadow of morphs. Thanks Igor Stasenko. http://code.google.com/p/pharo/issues/detail?id=4606 and I could not type enter on workspace I could everywhere else. I could reopen a workspace and it worked and suddenly stopped again. stef