Yep, flipped on the first big wave in the newly refurbished Smelter Rapid in Durango this afternoon. (In my defense the river was cooking at 4800 and I was in a small Jack's Plastic Cutthroat cataraft.)
No worries except I lost two almost new yellow 4CRS oars. (I think they are 8 1/2') If anyone finds them I'd appreciate a message.
PS The ironical thing is Sioux and I just finished a 21 day down the Grand Canyon and I didn't flip once. (No serious problems other than Sioux getting knocked out in the bottom hole at Upset.) Ah, the ignominy- to flip in Smelter. (If you find my oars it will ease the pain.)