1. When the power sword is equipped alongside a melta-pistol the character model holds the sword like a pistol. Additionally the sword animations do not occur, although the damage effects from pressing the mouse buttons do damage enemies. I do not know if this anomaly occurs when carrying any other sort of pistol or if it is exclusive to the melta-pistol.
2. I have experienced a single unexpected game shutdown when loading up a mission.
3. During one mission I noticed that the Nurgle daemon corpses remain standing up after being killed.
4. Mission breaking bug: During one mission I was tasked with destroying several Warp Gates which I found impossible because they were situated in the midst of green Nurgle healing mists that instantly healed any damage I caused to them. I tried plasma weapons, power sword, grenades and a rocket barrage but to no avail.
On the whole considering how early it is the alpha seems to be in good shape and I'm sure that you guys will iron out the bugs as we find them over the coming months. Praise be to the Machine God!
N.B. As an avid Warhammer 40,000 fan I want to thank you all at Neocore for making this game, it's what a lot of us have been waiting for for a long time. Thank you for seeing the potential in this incredibly deep and rich universe and creating something that, by release and based upon what I've seen so far, I'm sure will live up to our expectations. No pressure. ;)