It’s always funny when two arch-nemesis competitors do the same thing, at the same time. It’s even more funny when one wasn’t prompted by the other.
Oddly enough, neither has posted a changelog… so I have no idea what was improved on either update.
Update: Some have had problems with the October 9th Live Mesh update. Namely, computers aren’t showing up as being available for remote access. This was caused by two problems, and Microsoft fixed the one on their servers. Microsoft now says that if you are still having the issue, restarting the affected PC should fix it.