Ardweeny support PWM?

I have an Ardweeny from an old project and would like to continue using it because it so far has been a good stand-in for an Arduino. However, I'm getting strange inconsistent behavior when trying Pulse Width Modulation on the Ardweeny, which wouldn't be a problem on an Arduino. Does Ardweeny support it? If so, which pins?

Thanks.

PWM comes out of the same ATMega328 pins as on the arduino:
Physical Pin 5, D3
Pin 11, D5
Pin 12, D6
Pin 15, D9
Pin 16, D10
Pin 17, D11

You have normal bootloader/sketches loaded up?