Indeed def updates can do that (and have). I wouldn't say they have a habit of it though. I've done maybe 1,000 of them in the past few years -- not one has h

Indeed def updates can do that (and have). I wouldn't say they have a habit of it though. I've done maybe 1,000 of them in the past few years -- not one has had that hiccup. With that said though, except for high priority zero-days, we would actually roll ours up with our other patches so we can test them all together. There's only been a couple of times where we only did a smoke test and deploy def updates -- but we always do some testing on them. Always.