I reproduced the error on current SVN.
The warnings are generated because world bounds are "(0,0,0) - (0,0,0)". Since most entities are far from origin, this warning is printed for them.
It also explains the weird "memory effect" that you are seeing: proper bounding box was loaded during previous map start, but bounding box is not updated updated during current map start, so the bounding box from the previous start retains. It might be totally incorrect if two maps are unrelated, but in your case it stops the warning spam.
I did not get to the root cause yet, but will do in the future.
Most likely something about loading collision models got broken. I refactored/optimized something related to collision models loading in the latest dev build, and probably did not test it well enough to notice that I broke stuff real hard.
Meanwhile, use previous dev build.
Also, if someone else sees the same problem on the latest dev build, please report it here.
I'm not yet sure if the problem happens always, or is specific to this map...