While reading the NYTimes headlines, I clicked a link to view a new article, but no new page appeared. It was essentially a dead link. 'Took a peek at the code and the link was set to open in target="_0". What is this?
target="_0" isn't necessarily a mistake... If the link itself is valid then it should either open a new window (same as target="_blank") or in a frame, if there is a frame named "_0". If the window has already been opened, then it could be behind others.