Apple today released two separate support updates, one targeting Mac Pro owners and the other targeting Epson peripheral users.
Mac Pro Audio Update 1.1 (516KB)
The update fixes an audio anomaly that some users said came out of Macs Pro while using FireWire audio devices. The update is aimed at owners of models released in early 2009, running Mac OS X 10.6.3.
Epson Printer Drivers v2.3.1 for Mac OS X v10.6 (688.23MB)
The package includes the latest software for Epson printers and scanners on Mac OS X 10.6 Snow Leopard. The complete list of supported models can be found here.