Yep same for me, seems as if a building model has been placed on top of the control tower which has no clipping for any of its walls etc.

I second this, happened to me in a couple of the Police Stations I entered, about 5 seconds after reaching the top of the stairs my legs suddenly broke.

I have also had this happen on multiple occasions in differing buildings. It seems to occur with either the zombies outside of the building you are in, or if they are in any room within the same building.

I tend to avoid buildings like the plague when I have zombies in my vicinity as I have died/had ruined gear multiple times from this glitch.

I am also having the same issue (might pay to note I'm running a EVGA GeForce GTX760 4G FTW video card, also on the most recent drivers).

I have found if I set my shadow settings to 'Low' this removes the flickering, any setting higher than this and I get the flickering back.

Another victim here, once on top of the police station both legs became broken; another time in an apartment building just got the 'you are dead' message and found my body on the ground OUTSIDE of the apartment with only pants with damage taken indicating a fall.