I ran across an interesting issue with Microsoft Office Protocol Discovery. It was generating exception emails due to its use of the OPTIONS method. See http://rails.learnhub.com/lesson/page/2329-dealing-with-microsoft-office-protocol-discovery-in-rails for more information.
I implemented the solution there but soon found that every request for a non-existent URI (http://localhost/asdf/asdf/as/dfff/ff), generated an exception due to
http://github.com/rails/rails/commit/dcaa074abf5691a933b9c55159cc7d98a02b3b2f with more information found out: http://dev.rubyonrails.org/ticket/6953
It is strange to me that the route matching would throw an error because the path matched but the method doesn't. Shouldn't the route matching continue through the rest of the routes before making that determination?