This is really very strange. My printer driver (Canon i455 under 10.4.3) no longer offers me the option to print on high resolution paper, t-shirt transfer, transparency or envelope. They're greyed out under my 'quality and media' setting, leaving me only with plain paper, photo glossy, photo matte, photo pro. Also, I can't adjust the 'quality' slider even though it's active.
I've tried reinstalling the latest printer driver and fixing permissions but that hasn't worked.
Anyone got any ideas??