It was disabled by both the WOW TBC Gold monitors (both are the same brand however, they are different sizes and models) and also my AMD GPU settings. It seems like this has solved the issue. I'll keep on the lookout for other issues.
Original Post: I've experienced flickering issues, however, I would not hesitate to declare it full-on studdering. It's intermittent and is difficult to buy Burning Crusade Classic Gold determine. It was at the point of making me insane, and I decided to look into it.