Well, we already started our game quite a while ago with the 1.0.2, and we're running out of time very quickly, so changing now would be a huge waste of time if it's not needed. I updated my dll files to the CEGUI 0.4.1 version, and still it doesn't work. I would think that with this demo, the dll files that are with the demo would be the right ones, the ones that the original author used to compile this! Strange thing is, I can run the included exe, but if I want to modify it, and I try to compile it, I get that error.
Also, that CEGUI_TheoraDemo brings me back to the original problem, that we're using openal, not fmod. If someone could help me out with this, I would be extremely thankful, I'm really becoming desperate here... :cry: