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.
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!