Joined: Mar. 2005
Another thought: even if the current theory was wrong in some areas, it's still a useful approximation. If it weren't at least that, scientists would have stopped using it already. It doesn't take technical knowledge of the subject to figure that.
For comparison, consider Newton's laws of motion. At low speeds and weak gravity, they give results that are generally within the margin of error of all but the most precise measurements. (Just don't look at the precession of Mercury's orbit!