Either they all use the same newspaper, or all these shows take place on the same exact day…which kind of makes my head hurt.
Update: Slate has the story.
Brow Beat has learned that the prop comes from a small newspaper prop company called the Earl Hays Press in Sun Valley, Calif. Started in 1915, Earl Hays is one of the oldest newspaper prop companies, and the paper in question was first printed in the 1960s (note the top-hat ad on the lower left), then offered as a “period paper,” better suited for Mad Men (where it has not appeared) than Scrubs (where it has). The screenshots don’t actually reveal the same prop —just various printings of the same file. The front is blank and can be customized, but the inside and back page are always identical.