I have played the mod with the freshly installed 1.2.2 patch. I played with two other players. Some problems, that we have found:
-One player revived another one and cought a bullet (didn't die) and after that, he could not draw a weapon anymore. (pressing the buttons 1-4). The problem solved itself, when we loaded into another level but this could be a real problem in some situations.
-I don't know if this is wanted like this but if someone dies, he has no access to his armour or money from his inventory. (die once --> no money left)
-Weapons that were held in the hand, disappeared in the case of death.
-There is no number display of Stalkers in the surrounding. (not a big Problem)
