I have two battlefield keys for Act 2, yet when I got to two of the entrances, they were both locked. As slowly as the characters run now, I don't feel like running around even more, just to find out I can't get in. Should'nt the entrances be opened for me to at least the second level?

Perhaps now would be a good time to mention that the sound is now weirding out as well; If the music starts playing, no other sounds can be heard. Music off-other sounds now heard. This sounds like a conflict with my sound card somehow, but of course I'm just guessing.