Apple today released HP Printer Driver 1.1.1. The release notes suggest that this update contains a fix for an issue with LaserJet Printer Presets.
The update weighs in at 405 MB, requires Mac OS X 10.5.3 or later, and will only be visible in Software Update if a printer requiring the update "is connected to your computer or a print queue has been created for an earlier version." Apple previously released HP Printer Driver 1.1 via Software Update in late July.