I don't think that these buffers change anything with your game. This should be the buffer that contains the text you type, in the Comand Prompt, so you can scroll it back and forth.
Anyway I have heap problems too. Is there a limit of Print comads used in a script. I have quite a lot of them in global script (Main), and when I want to put some more in local scripts, I get Out Of Heap Space errors. Any ideas? Could they not be unloaded form the memory correctly?
-Eigen