Last week I was able to print double sided to my LAN printer here at college... now the option is grayed out. Could this be due to me installing Snow Leopard? *EDIT: Hmm, I found the issue. "Duplex Unit" under the "Drivers" section of the printer in System Prefs seems to have been unchecked. What would have unchecked this? Installing SL? I read others had issues with their drivers upon installation of SL... anything else I should be checking?