Maybe "or higher" means "It's really .8 and any higher version is optional".
Looks more like Apple doesn't understand how fractions work.
Version numbers aren't always read as decimal. Most open source and Mac software just increases the number as an integer, i.e. .10 is > .9, not .10 == .1.Otherwise, what do you do at .9? .91? What about at .99? .991? That's just silly.
C'mon...it is just a beta. They will fix it in the "release" version, or in one of the many patches that follow it, or in the next version that is due six months from now, or...well, Microsoft has many options. The clients don't.
I guess the point I was making is that since there is ambiguity ("aren't always"), that immediately saying that MS can't count is a bit of an oversimplification.