Phusion passenger calls home
While on a ship at sea with slow (sometimes no) internet, I was developing a Ruby on Rails application for local (onboard/intranet) use. I discovered that Phusion passenger (modrails) calls home. This error layout file:
has a stylesheet link to modrails.org
Theoretically this layout will happen only in development, because we all completely test our code, but you may want to comment the offending line everywhere you have it installed. At best this is rather annoying on slow connections or disconnected laptops. At worst, it's some devious tracking of modrails users.
The image link could be removed with no loss of functionality. To maintain the "prettiness", it could be loaded as a data URI although older browsers don't recognize that. In any case, the developers are rather uninterested in changing.