I have no idea what you're saying here. I've re-read it 3 times and I can't figure out what problem you're experiencing.. I get the first part, up until "if I grab the screen using Jempeg."

I assume he's getting a screen grab. Does "Jempeg" (I assume jEmplode) grab from /dev/display or /proc/empeg_screen.raw? I assume the former, which would explain this. It's not a bug. That's how it works, if that's where it grabs from.