Yesterday I was investigating why exception_notifier wasn’t, well, notifying me of exceptions.

I checked out the log, and I was getting an error like this:

ActionView::TemplateError (protected method `filter_parameters' called for #<Admin::ProductsController:0x2aaaaeccd6b0>)

Turns out Rails 2.1 breaks the version of exception notifier you get by running script/plugin install exception_notifier. To get the correct version, you have to run script/plugin install git://github.com/rails/exception_notification.git

Pretty lame, they really should update that.