I'm on the part where Lucius wakes up at night. I sneak outside and break the light bulb but each time the door behind the detective is locked. All the walkthroughs I've found say you should be able to go through the door. Did I miss something?

Tried it after the patch, same thing.

I'm just playing through this now and I don't know if this is the answer for you, but after breaking the lamp you have to press 1 to go back to normal interaction mode, otherwise there's no active hotspot for the door (as you're still on the telekinesis mode).

But if you've done that and the door frame's showing as red/ locked instead, I guess it must be a glitch - I can send you a save for chapter 6 if you need it?

Yep, that fixed it. The game won't let you interact with objects with a power selected. I holstered the telekinesis and it worked fine. Thanks for your help.