Effective UI interaction
Have you ever been half way through a web form and clicked a help or tip button thinking that it would open a new window or an overlay, but instead it takes you away from the page and you lose everything you’ve typed? It doesn’t happen often, but it happens enough to be weary. I was suprised when I hovered of a “See examples” link at LinkedIn to find they’d included a tooltip, “New window will open”.
It’s a really simple way of helping the user, but to me it’s the essence of good UI design and it would be nice if everyone could think about how the user interacts with their website or service in the same way.