No, I didn't see it. Glad it does work. Strange that there's a problem with other resolutions, though. No problem to pass it on. It's zlib licensed and available from a public web server
No double buffering. You'd have to alloc two times the screen size, render to the backbuffer, and tell the FB to change it's currently active window (via ioctl). My embedded devices don't have a double buffer, so I didn't bother with it.