I'm no longer in your shoes, but what I learned when I was is you never, ever "upgrade" production systems to a .0 release. That goes in the lab for fleering and misc hilarity. I paid a lot of tuition in lost sleep to learn that lesson.I *am* such an systems administrator for a company. And *the hell* I would schedule upgrades of critical systems either based on some *expected* (it actually says so on the release schedule page!) RELEASE-date and in general never directly after a new major release.
Ask me what happened when the large software company I was working for decided to trick our users by calling what should've been an 8.0 release 7.2.