bug or feature? no apparent script values are changed that could lead to this, and i tested this on a 100% fresh install SVN but the CV is totally immune to enemy DU fire from the small DU version, dont have time to test the large one
i think it has to do with the "APBullet" tag edit, negative, APBULLET is fine (bio works and uses the apbullet tag) seems to have to do with the resists as you said
Nope, it's the old DMG_BULLET. Check DU and make sure it isn't using the hl2 DMG_BULLET because that's ignored. I added a check in my resist system that ignores DMG_BULLET but DU should be using something else. (I think, this was a year ago)