Apple has released a supplemental update to OS X 10.6.8, which fixes some of the outstanding issues that cropped up after the original 10.6.8 update. These include printers not working properly and going into a paused state when printing, and system audio not working properly when an HDMI or optical audio output is being used. In addition, the update includes the latest version of Apple's Migration Assistant software to ensure a smooth transition from a Snow Leopard Mac to a newly purchased one running Lion.
The supplemental update is about 10MB in size and should be available via Software Update, but can also be downloaded from the Apple Support Downloads site as a standalone installer. The update requires you to have already installed OS X 10.6.8, and will require a restart after being applied.
If you have not yet installed the 10.6.8 update, then you will not need to install this update, as Apple has incorporated it into version 1.1 of the regular Combo and Delta OS X updaters. These can be found at the following locations:
As always, be sure to back up your system before applying this update, but if you have installed OS X 10.6.8 and are experiencing printing and audio problems then installing this update is recommended.