This issue occurs with Nvidia cards, the error usually pops up when stopping a game and then trying to start another game.
You also get this error when starting a game with dual core disabled..
In the first case I mentioned, you can't stop a game then start another game without this error popping up, you must first close the emulator, relaunch it, then start a game..
This is a Nvidia specific issue, it does not occur with ATI graphics cards/chipsets..
I have a Geforce 9800 GT with the latest 181.22 forceware drivers.