> Ok, the rule of switches is that they move sliding walls within 4 squares (inside the 4x4 lighted view, assuming 4 is your current light radius) and no others. In other words, no switch can move a wall that's on a wholly other part of the level. So hunting for alternate switches isn't the answer.

Thank you! Well, in a way, it was an alternate switch that needed throwing first. After that I didn't get the "movement cuts short" error for the appropriate switch. On to level 4! (well, tomorrow; even Evil Overlords need their sleep)