I first encountered the lag issues after the transition to the 3rd floor of the Mortuary. Prior to that, the game ran smoothly, but suddenly the game was running unbearably slow, plus the sound dropped out. I installed ddrawfix, but it didn't make any difference. I then turned on vsync via my graphics card software, and that did the trick. No lag, sound was back, everything was grand. Then I made another transition, this time going from the 3rd floor to the 2nd, and as soon as I made the jump, same issue.

I'm not sure what's going on here. Perhaps the autosave is the issue, but honestly I have no clue.

Anyone else have this problem? Or more importantly, the solution?