gimp-1.3.23 is out. Just copying the old ebuild didn't work for me.
No problem here with renaming. I simply renamed the ebuild, removed everything debugging-related from it and it emerged fine.
basicly copying works for me. Done now. Give it a try. Don't forget it's a p.mask-ed devel version, it comes with no warranty. Debugging is in there is because it's a devel version, so when it breaks it can give some useful output for the upstream devs right away.