So one of the latest Get a Mac TV ad has the the PC saying, "If your printer doesn't work with Vista, buy a new printer!" As if Vista is guiltier than most OS upgrades at breaking older hardware.
When we upgraded to Leopard, one of the things that didn't survive the upgrade was our HP PSC-1610 printer/scanner. So what did we do? We bought a new printer. Because our printer didn't work with Leopard. Pot, kettle, black.