Stop if you’re playing Keep on the Shadowfell! There is a KOTS v1.5 available!
While I haven’t read the entire thing, Wizard’s has updated keep on the Shadowfell and put it up for a free download today. For starters, they added a different type of Kobold to the Irontooth encounter, a Kobold Denwarden. And the skill challenge with Sir Keegan has the errata applied, while Sir Keegan himself has been redone, making him a lot tougher monster.
http://www.wizards.com/dnd/files/H1.pdf
I haven’t looked for all the changes since I’m not going to run it again. I came across those particular ones by accident. Let me know if you spot further changes from the published version of the module!
www. Newbie DM .com 
Sean Brady
April 28, 2009
Thanks this is good to know. I was going to simply print some of the maps from the PDF, but I guess I will read the whole thing.
Questing GM
April 29, 2009
The changes that I’ve noticed so far are
They’ve removed the halfling slinger from the Burial site encounter and replaced it a with a Kalarel’s Spectral Apparition (Level 4 Controller)
They’ve also included the secret room in the Keep and the skill challenge of stopping the ritual from Dragon in the PDF.
greywulf
April 29, 2009
Ooooo. Well spotted!
MJ Harnish
April 29, 2009
I sense v4.5 on the horizon…. (just kidding).
Depo
April 29, 2009
this is awesome, i am running this with my group right now and i was thinking of tweeking it a little by adding some stuff or moving stuff around. Good eyes man
Roy Eyal
April 29, 2009
Even with many other changes I’ve noticed, this module had lots of role playing potential, but is still not much more than a long hack-n’-slash adventure…
ofir
June 23, 2011
This is a great module!
tnx