Unecessarily long boot up time
Far too often I'll try to boot up gimp and have it search for fonts for 2+ minutes. Just in general, it never boots nearly fast enough.
It might not seem like this is a big issue, but's it's killing the credibility of this application.
I seriously like this application and will continue to use it loading screen or no, but this is really, really damaging the app. I don't even care about the fonts. Just open as fast a possible, so I can keep working.