It might sound like the most pedantic obsession over minutae, but stuff like this matters.

It matters not just for us user experience people who pore over every detail, but for ‘regular users’ who are forced to approach interface after interface: re-learning the basics over and over because of design decisions made without proper thought.

http://willgrant.org/chrome-17-loses-the-plus-from-the-new-tab-button/