EU Gamedays are during school. I did not participate. But I went into stage one and two and did what I promised. you did a really good job playerclipping - I didn't find much. Most of the screenies below are just to show where I am, so it's really not as much as the 37 screenshots below seem.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c000.jpg
See that wooden beam running across the outside of the building?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c001.jpg
I can stand on it. See the window ledges?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c002.jpg
I can stand on them.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c003.jpg
The other window requires jumping to get in from where I am. The metal sheet clips through the wall and makes me stuck unless I jump into the room.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c004.jpg
This door to my right?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c005.jpg
Isn't aligned with the doorway properly. This is the second one I've seen - go through each door and check.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c007.jpg
You know this room. The one with the full health and all.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c009.jpg
I can jump onto the window,
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0006.jpg
And on top of either side's door.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c010.jpg
I can get on here. Not that useful of a spot, though.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c012.jpg
See where I am? That skull on the wall...
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c011.jpg
Can be jumped on. Oh, and...
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c013.jpg
Those two boarded up window things? They're playerclipped, so I can't jump on the little ledge they have, but I get stuck if I sidle the wall there - triangular playerclip from wall to ledge would fix that.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c014.jpg
I can jump up there and hang around, too
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c015.jpg
And in the same place, a brush sticks through the metal sheet (nice makeshift sniper fence - never noticed it wasn't the prop)
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0016.jpg
I tried it on BLU's side, and it didn't work, so i think only this fence has a problem. Oh, and I just noticed that part of the brushwork in that makeshift sniper fence is clipping through the metal sheet.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0017.jpg
The door doesn't appear to be the complete size of the doorway. I can see through that one.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0018.jpg
Same door as above, but from the outside.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0019.jpg
You missed a dev texture
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0020.jpg
I can't tell if it's the lighting or what, but the tracks aren't coloured the same.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0021.jpg
I can jump up on this sign.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0022.jpg
Another door that I can see through the top.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0024.jpg
The door on the left?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0023.jpg
I can also see through the top of it.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0025.jpg
I'm on another skull, in the same room as the previous picture.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0027.jpg
Those windows?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0026.jpg
I'm on them.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0028.jpg
Same place, the door on the right? Go in, and you've got this...
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0029.jpg
Floating door prop.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0032.jpg
Keep walking, and yo arrive here.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0030.jpg
And I can just barely jump up here. Why?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0031.jpg
The vent is solid.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0034.jpg
That vent too,
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0033.jpg
Is solid.
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0036.jpg
In that little room to the left,
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0035.jpg
I can jump onto the wood. Oh, and it's very boring behind the fence material. It's...just empty?
http://dl.getdropbox.com/u/1490725/plr_nightfall_a11c0037.jpg
Somewhere on stage 2 (I noclipped there, that's why the gate is still down), those tracks aren't aligned, even though it looks like if you rotate it one degree, it'd be fine.