Does not work at all for me.
Using: Firefox 3.0.16 & Greasemonkey 0.8.20100408.6

Thank you for update-ing the script, its working great

This is a very nice and helpful script, but it'd be much better if the button is a bit smaller, it covers my market button.

Good for removing header and such, although I still have the footer on mine, which says

"Support | Forums | Twitter | Shop | Become a Fan!"
"If you are having trouble seeing FarmVille, please update your flash player by clicking HERE.
All items including but not limited to user interface, design, game design, artwork and scoring system Copyright © 2009 Zynga, Inc. All rights reserved."

If that can be removed, 5 stars easy!
Keep up the great work! :D

FarmVille is a nice Facebook game by Zynga. This script "clean" the game interface by removing banners, footer, header and other unneeded elements. Plus, the script provide a nice button to toggle on/off the modified layout.

I like it! A must have if you are going to play FarmVille on a small browser windows (1024x768 for example).