see this post:
Looks like the essentials update was official errata...
BTW, anyone else not able to reach the wizards homepage?
Hmm. I found a strange thing.
The above mentioned "October 2010 Updates" is quite small. It does not even contain the racial stats changes and other revisions suggested by "Changes Coming in Essentials" article.
Dungeons & Dragons Roleplaying Game Official Home Page - Article (Changes Coming in Essentials)
On the other hand, if you click "Rules Updates Archive" and read the "Compiled Rules Updates" there, you see those revisions are included as updates for PHB and such.
Dungeons & Dragons Roleplaying Game Official Home Page - Article (Official D&D Updates Archive)
Hmm? Does that mean the design team has forgot to add those revisions into "October 2010 Updates" file?
Or, are they considering "Changes Coming in Essentials" to be, actually, a kind of "September 2010 Updates" or something?
This kind of "stealth" update is very, very inconvenient.
A panda-man robot monk.
I already made one of those.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.