It always puts me off when I go to a Flickr photo page and its spews all of these “note” boxes all over the photo. I don’t want to see notes by strangers. I want to see the photo. These are ugly, distracting, and obstructing.
I know they only trigger on mouseover, but a 500x320 box in the top-middle of the content area is such a large target that you can’t assume that my mousing over it is an indication that I’d like to perform an action or see extra information. There’s even a pretty good chance that my pointer is already in that area when the page loads.
The otherwise-excellent photo is via Peter W. Knox.