HP Photosmart 8450 (8400 series) stops working after Leopard Install

I upgraded my MAC Pro and iMac to Leopard and now my HP Photosmart 8450 printer will not work with either one. As other people have pointed out, the driver is built into Leopard, so not clear how to fix this or if there's a patch...any thoughts? Forget about HP support, they want to charge a fortune for telephone support. - Alec

How won't it work? Are you able to add the printer? Have you taken any troubleshooting steps, such as resetting the print system and then re-adding the printer. Were the HP Leopard drivers installed when you upgraded?

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