Cracking Zunes?

There's a rumor around saying that the numerous reports that Microsoft Call Center has been receiving, regarding the Zune screen cracking for no apparent reason after being left charging overnight, have a good reason after all.

Apparently, the lithium ion battery -- which resides right behind the top half of the Zune's screen -- is expanding from overheating and putting too much pressure on the screen, causing it to crack.

Now, is this really true? Or is this just a story a few Zune-droppers conveniently made up to try and get a free repair? You all Zune owners be the judge...

Source: Engadget