While on a ship at sea, I was using Moinmoin wiki to record some local documentation. We had internet (usually, except when the ship pointed a certain direction), but it was a bit slow and expensive. So I was annoyed to discover that Moinmoin was calling home in several places.

Mostly it's in the Help documentation, illustrating how to do external linking via {{...}} embedding. It was still annoying and tended to lock up my web browser while I was trying to get local help when the internet link was down. Here's the list of offending underlays I found in 1.8.7:

HelpOnCreoleSyntax/revisions/00000001
HelpOnLinking/revisions/00000001
HelpOnMoinWikiSyntax/revisions/00000001
MoinMoin/revisions/00000001
WikiCourse(2f)17(20)External(20)links/revisions/00000001
WikiSandBox/revisions/00000001

I reported the situation, but the developers don't seem to care about even placing a warning in the documentation.