I'm completely confused by the second sentence here:
"Unfortunately, for one reason and another, despite a delay for a fourth release candidate, there are still some circumstances where an upgrade will not re-register some built-in extensions, and silently exit on first launch (just re-run it). On the down-side that can affect spell-checking dictionaries, and (for some) on the up-side disables Auto-COrrection too."
I'm wondering if it is significant that the second letter in "COrrection" is capitalized? Like, the feature that automatically corrects TWo INitial CAps will be disabled? But some people find that auto-correction annoying and will consider it an "up-side" that it's disabled? Doesn't really make sense to me, but it's all I can think of here.