jeff_g, I tried that same code for 2.0b7 on Windows, and it rendered a plain white screen, nothing more. That is not what the 1.5.1 code shows (rotating planes). So there are no errors and it runs, but the output is not the same.
Peace.
The code that andres posted above runs and produces no errors for me now in the latest version of Processing (2.0b7) for both Windows & Linux. However, it also does not have the desired output. The screen should be full of randomly colored squares, and instead it just outputs a plain, black screen. I am unclear why this is.
Peace.