Nobody Listens Anyway

I have been working with rFacebook to try to get a Facebook application up and running. Right now we are trying to integrate our conference application - 51weeks.com with Facebook so that our users can take advantage of existing social networks instead of having to create yet another network at he conference they are [...]

This problem may not be specific to rFacebook, but when I added acts_as_facebook_user to my user model and then made a call like:

my_user.first_name

I would get an 500 internal server error. I checked the log and saw this:
CGI::Session::CookieStore::CookieOverflow
I found that if I changed the app so that it uses db sessions everything started working.
Uncomment this [...]