[TYPO3] Extensions Red in Extension Manager

[Nate Russell]

Hello,

Can somebody please tell me what it means when the extensions in the 
Extension Manager are red? Here is a screenshot of what I mean.
http://www.int-res.com/extension-manager.png

All of them, with the exception of RealURL and Web>Template further down 
the page, are like this. Does this have some special meaning in 4.0? 
I've never seen it in 3.8.

Nate