got mine working at 1680x1050 with no problem and no alterations to the code. It was at 1280x1024 from my old monitor. Hooked up my new widescreen and it was initially didn't fill the screen. All i had to do though was hit Alt + Enter to make it windowed and then alt + enter again to make it full screen and the UI self-adjusted. Works and looks great!
Here's a screenie for proof:
Rock on Profit Reborn!