A few days ago, I changed the table name of the wrong table (without realizing it, of course). Suddenly, my rails app wouldn’t start at all, and no errors in the development log. Naturally, I had a client demo in less than an hour….

What I’d done is change the name of the sessions table to something other than what was in environment.rb.

So, if you happen to have this problem, that’s one place to look.