Hm, that's helpful. At least I'm not alone. I kicked the resolution down on my image and left it at that, since I was planning on eventually vectorizing it in Inkscape and editing there (I've already done this, actually). I would have been happier to preserve more detail than re-create it, but whatever. For what I'm doing now I'm not unhappy. Before I use GIMP for anything intensive, though, I need to figure this out or get a patch, when offered. I already checked my environment preferences and changed them to correspond to my system; I ran it with my virus/spyware programs set to "gamer mode", and that probably helped too. What irks me is it was NOT a large file to begin with.