I've read about this problem since the update yesterday that mappers are having when trying to compile:

"Extra App ID set to 211, but no SteamAppId."

I'm getting it just trying to open the SDK model viewer.

I've tried the suggestions posted on the steampowered forums but they haven't worked. Is anybody else getting this error when they try to open the Model Viewer or the face poser?

I've been getting the problem, and its not only just the one you mentioned, I can't compile my maps, it keeps telling me that the steam.dll is missing and for some reason its trying to compile HDR when i haven't done a thing in HDR at all.
Then also loading a map of mine up crashes my game, which is somehow related to this balls up in the SDK.

I'm just redownloading the beta sdk now from a fresh install to see if that will work.

Thanks for your feedback.

Let me know how your reinstall goes. Hopefully it'll fix this problem.

same problem here.

Wow....they patched it the same day!!! And people say Valve doesn't listen Pffft...

They did? Great.

I've been at work and and I had a formal party last night, so I wasn't playing with Steam. That's great news though, and a timely response from Valve.