Apple has released a Snow Leopard driver update for Lexmark printers that "includes the latest drivers for printers you have used on your system." More information on supported Lexmark printers is available from Apple's Web site. The update is available via Software Update and the Apple Support Downloads page. (Free, 121 MB)
Disable Caps Lock
If you find yourself pressing the Caps Lock key accidentally as much as I do, note that you can disable it entirely in Mac OS X. Open the Keyboard & Mouse preference pane, click the Modifier Keys button, and in the dialog that appears, select No Action from the Caps Lock pop-up menu. You could remap it to another modifier instead, but that might make using differently configured Macs more difficult.