Recently, I was installing Rails3 on my Debian unstable machine and I noticed an error that was really strange.
Here was the error:
ERROR NameError: uninitialized constant ActiveResource::Base
The problem ended up being that I was missing this deb file:
I have seen posts from people proclaiming that uninstalling old versions of activeresource would do the trick, but I reinstalled activeresource-2.3.5 gem after Rails 3 starting working again without a failure. I hate cryptic errors like that.