Topic on Forum:Wiki Updates
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I recently added a new gadget to the user preferences (defaults to ON by default, but can be disabled) that changes the look of most MediaWiki stock skins like Vector and Monobook to have rounded off corners and a smoother design. It does not affect custom skins like Monaco or Foreground.
I added it just to see if it would work well, please report any problems, suggestions, or complaints to the Tech Wishlist forum.