This went on awhile ago and I forgot about it but I'm looking over some
pkg stuff and came across the fact that I installed graphics/gdk-pixbuf-extra directly, which puzzled me a minute until I remembered: when I installed graphics/mtpaint, it didn't display any toolbar or menu icons and I figured out that it was using xpm (IIRC, maybe xbm or something) icons and installing the extra package fixed it. If this is the case, wouldn't that make that library (or something that provides xpm support) a dependency for mtpaint and would it be a bug that it isn't? And can anyone confirm that I've got the right problem and solution?