One of our production Macs seems to have a intermittent problem with printing in Classic. Every once in a while a file will just hang when printing - after you hit print and get the "printing" dialog box (eg. Quark). You have to Esc out of it and when you go to check on the Chooser, it crashes and you have to restart Classic in order to get it working again (for a little while anyway). It was a problem in 10.3.9 and continues to be a problem with 10.4.3.