Sorry for being so out of it in the past month. I've been doing other things, like playing SC2.

Anyway, I tried out this latest version of dim3, and I deleted my empty "Application Support/dim3" folder first. It went like this.
I opened the engine. It was defaulted to Window-640x480. I couldn't click any buttons at all. I tried clicking to the desktop and clicking back to dim3 several times... nothing. I then tried clicking to the desktop and then clicking back to dim3 but on the windowed dim3 top bar thingy. That worked, and I was able to change settings and whatnot. Changing the engine from windowed to fullscreen resulted in a completely black screen that did not change. I couldn't quit except by force quitting. When I got back into the engine, it was full screen, and worked fine.
I then opened the editor, and loaded up a map. I was able to start the map, but the whole engine screen was 100% grey. I could shoot and all that because the sounds played, but I couldn't see anything. Clicking back and forth from desktop to the engine did nothing.
I checked RAM consumption between using and not using the engine, and there was only a very minor change.
I am currently running Mac OS X 10.6.3 on my iMac 2.4Ghz, Radeon 2600HD Pro, with 2GB of RAM. I'd really appreciate a fix for this, because right now, I can't do any game work at all.
In case you don't remember, this happened as a result of me deleting the dim3 folder in my App Support folder. Even when I created a new one and copied it back, it did nothing though.