Erik, I think you're running in 32bpp mode, right? To have 'png' render RGB24.png correctly make the following change to /sys/src/cmd/jpg/png.c:
% yesterday -d png.c diff /n/dump/2009/0304/sys/src/cmd/jpg/png.c /sys/src/cmd/jpg/png.c 139c139 < Image *i, *i2; --- > Image *i, *i2, *i3; 205c205,207 < image = i2; --- > i3 = allocimage(display, c->r, RGB24, 0, 0); > draw(i3, i2->r, i2, nil, i->r.min); > image = i3; what this does is "filter" thr 32-bit alpha blended original through a 24-bit RGB image. this circumvents the bug by avoiding the conversion from 32-bit image to a 32-bit display. alternatively, you can try going down to 24bpp. i am not competent to dig through the parts of memdraw in order to fix this, so i won't offer to do it :)
