please can you take a look into the current gbcolor driver ? It seems, something is broken. You can test: The Legend of Zelda - Link's Awakening DX, The Legend of Zelda - Oracle of Seasons, Legend of Zelda - Oracle of Ages, Lemmings, Lufia - The Legends Return, Joust & Defender, Crystalis, Wacky Races, etc.
All these games are running on the last official MESS version.
Hmm, Link's Awakening DX looks normal to me.
Etabeta, could it be an update that you did for the lists that caused some of those games to not work anymore?