Here's the whole list of fixes:

#Fixed a problem where SI would get stuck around the trains
#Made the map harder (mostly because of the point above)
#Changed the texture of the ceiling in the metro
#Added fog
#Fixed a problem where infected would linger on the roofs of the entrances (the glass now breaks when infected steps on them)
#Fixed the medical cabinets so that they can be opened and looted
#Tweaked the number of available units of each item
#Added a ammo pile at the information desk
#Added some pills on the second floor
#Added a defibrillator on the second floor
#Added a light at the corner of one of the diner booths
#Added a breakable wall for tanks on the second wall
#Scripted some infected spawns to force the player in certain directions
#Added some molotovs on the second floor (but reduced the number of available units on each item)