Your error message still mentions a package from an unofficial repository. Try searching in the package manager for everything with gimp in it and remove those packages. Then try installing again.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gimp in ubuntu. https://bugs.launchpad.net/bugs/683471 Title: Unable to install GIMP on Maverick -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs