Grey line across firefox and explorer windows

How do you get rid of the grey lines in the middle of the toolbars in firefox?

You can see in this image that the title bar isnt correct,

this image is from the real mac os x, and it has a dark bar between the title bar and the next part of the window.

http://flickr.com/photo_zoom.gne?id=996102488&size=o

http://flickr.com/photo_zoom.gne?id=995253583&size=o

http://flickr.com/photo_zoom.gne?id=996132092&size=o

#466931

Look HERE

And look for a post by Zondajag (Somewhere around Page 9)

Good luck.

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