[adventured]

Screen real-estate for legitimate content is often at a premium and then they go and steal some of that land with sticky headers and or footers. I occasionally run across mobile sites that use both at the same time, while throwing in ads here and there, it's an atrocious experience.

[tylervigen]

Yes but then I think they should leave the header at the top of the page. If I need it I'll scroll all the way back up! Don't make it randomly re-appear and cover the text I wanted to see because I decided to re-read that last paragraph.

[swiftcoder]

Especially since mobile browsers typically have a shortcut for scroll-all-the-way-to-the-top