Use Software Update to find updates for your Snow Leopard installation.
Depending on your computer setup and installed printer drivers, running Software Update may list printer driver updates available for your computer. On my iMac, for example, which is connected to a LaserJet 2100TN, Software Update notified me of HP printer driver updates. On my 15-Inch MacBook Pro, which has Brother printer drivers installed, Software Update notified me of Brother printer driver updates.
If you use one of these printers and are not being notified of updates, either the driver is already up-to-date or it is not installed properly. Install the printer drivers you need, then run Software Update to see if an update is available.
Any printer driver updates that are released are likely to fix any Snow Leopard incompatibilities.
Good luck and please use the comments here to let us know how you do.
