After the 1.0.1 Patch I got stuck in the "Fix the machine that controls the eastern bridge" puzzle. My last save before the patch was just outside the control room with the puzzle solved and the machine running (but had not pulled the lever yet). Then it updated to 1.0.1 and now when I pull the lever nothing happens (both levers).
ps.: I'm playing the steam version.
There is a similar problem in the steam forums where a user also got stuck on a puzzle.
http://forums.steampowered.com/forums/sh...?t=1445951