There's a longstanding problem with the way number boxes grab keyboard
input
(by binding themselves to a symbol, related to the "receive set" bug people were just talking about.) I'm going to fix it but it will require changing the way "key" events are dispatched in g_canvas.c.
By the way, is there any reason to not directly capture events (like enter/leave/etc.) of canvas widgets from tcl/tk? Could any problems with future pd versions arise?
greetings, Thomas