Additional note... we both had exited and rejoined rather than respawned. In no way were we trying to take advantage of the previous exploit, just used to clicking abort from Arma II.

Confirming this report. Came here to report this also. Zombies are not only clipping through walls but they appear to be ignoring building walls for aggroing via vision and hearing.

1. Seeing through walls (will check/file another report for this)
2. Clipping/pathing through walls

I can confirm this also. This occurred last night for me in Kozlovka and Balota (barracks specifically). There were repeated instances of zombies aggroing from what seemed like far distances while I was completely out of line of sight and what should be a good distance where smell should not come into play. The zombie would then clip straight through the building to attack.

The buildings I was in when this occurred were a red enterable house and the barracks. However, it has happened in others.