Per a live chat with support, I am downloading the file at this link:
This is supposed to contain a release candidate of lightroom that contains this camera raw file, or at least support for my Panasonic Lumix DMC-FZ200. I will update this if there is an issue with this solution. If you do not see an update, it means that this fixed the problem. I expect it will.
I'm going to reply regardless of whether or not you decide to update us. Lightroom does not use the Camera Raw plugin. Never has, never will. Camera Raw is a plugin for Photoshop and Photoshop Elements. But all of that technology is part of the core program for Lightroom. The only thing you need to do is apply updates to the program as they are released from Adobe. Whenever there is a new major release (next one will be Lightroom 5) you will have to purchase the upgrade. But the updates that will be released for Lightroom 4 will be available to you at no cost. At the present time there is Lightroom 4.2 RC (release candidate) that is available. It seems to be pretty stable on my system. But there is nothing more recent than that.
I'll echo what Jim has said, only more succinctly:
Lightroom and Camera Raw don't go together.
Camera Raw is part of Photoshop.
If Lightroom is emitting a message that makes you think you need an update to Camera Raw, Adobe needs to clear that up. I don't have Lightroom, but I wouldn't put it past Adobe to emit messages making you feel you need Camera Raw 7.x - and thus Photoshop CS6 - to go with Lightroom.