http://bugs.winehq.org/show_bug.cgi?id=9359
--- Comment #17 from Henri Verbeet hverbeet@gmail.com 2010-05-28 07:39:02 --- That's probably just what the Windows drivers the card ships with support. It's not uncommon for the GL version to increase over the lifetime of a card, provided of course that the newer GL versions don't require features the card doesn't have.