I am using OmniAuth to allow users to log in with their Google OpenID accounts. When I try to log in in development mode with WEBrick, I get a WEBrick::HTTPStatus::RequestUR
I ran into this same issue with Caseproof's DataTables gem using Webbrick and a table that had a lot of columns (> 15). Switching to the thin server resolved my issue as well. DataTables is a javascript/jquery plugin for creating tables.