Awhile back, I posted a screenshot of me on a wood plank sticking out of a wall beneath what looks like a metal door. Right when the map starts, from RED's spawn, take a right after the stairs and on the right side, where the path through a building is, above it is that metal door plank thing. I can get on top of the metal, but not on the plank since you fixed it way back when. Make that prop or brush, whatever it is, nonsolid or playerclip it. I can also jump on the map in RED spawn.
I think I've found all the places I can jump.
Also, in the building before the last point, may I suggest making the lights that hang from the ceiling nonsolid, specially the ones in the low-ceiling'd parts. I was jumping around while being attacked and got stopped.
The buildings you put before the 3rd point to prevent Demo caps - I see wooden beams at the top. Make sure I can't get up there before you release it so you don't have to fix it afterward!