Whoopee, there's a gimp3-app in the ports
Oh, what fresh nightmares will it inflict on me, I'll have to see.
Didn't take long, built instantly. The only tool that seems to work is the paintbrush, presentation very nice, boy I'd be in a panic if I needed the tool and wasn't comfortable removing 3 and reinstalling gimp-2. Tried an Artistic Gimpressionist filter and the Undo function stopped, though the Undo History still worked. The colour selection seems bit wonky; can use the Change Foreground Color / Change Background Color but the paintbrush uses the previous colour when first activated, then switches to the new chosen colour as you move the brush.
It's funny to watch, but would certainly be a nightmare if a person was depending on it - at the moment it's acting more like a pre-Alpha than a Release; I'm delighted it's available for testing out and hope it'll get some of the major issues sorted shortly.