Upgrade to 10.6.4 from Tiger solved printing

I finally got around to upgrading Tiger to Snow Leopard 10.6.4 on this iMac, and am enjoying several benefits of that. Including one that was unexpected. I gave up on printing to our networked (Airport Express) printer on Tiger long ago after many experiments. But with Snow Leopard, I tried printing after letting it set up New Printer, and it began printing just fine. (I went to Snow Leopard as an upgrade, not a clean install, and it went very smoothly. I did a little backing up via DropBox, first.)