Hi,
I am having a similar problem with my terminal window. Sometimes it freezes showing nothing at all, sometimes it freezes showing only a few lines. Sometimes words are chopped off and carriage returns are missing.
Indeed, I wrote a PrintToScreen("hello world\n") program and even *that* didn't print.
I am using the VEX USB to serial connection and I also am not using more than 1% of my processor.
I originally had Easy C for Vex on the computer before I loaded Easy C Pro. Could this be an issue?
Also, what are you using to view the output (hyper terminal)? Can you tell me if it is worth my time investigating that?

thanks!
jen