^If you are not rooted and have no interest in rooting then update. I believe it was a patch for the rooting vulnerability exposed.
^
He's correct.They say it has minor improvements.lol
Amazing how quick they put out a patch,but took forever to get2.1.
If you use the RUU from before the patch that got us to 2.1 you can root again. I just did it and it works perfectly.
The software version of the RUU you want to use is 2.27.651.5
This will get you back to the original 2.1 update that can then be rooted.