I print nicely full (auto) duplex in windows 7 on the MP640. However, Turboprint 2.17 doesn't print full duplex in Ubuntu 10.10 64b although duplex mode is set to auto. How come?
I printed from the Ubuntu Firefox browser and here is no option to set duplex printing. Using OO Writer as you suggested printed OK in duplex mode. So I was a little premature on your product. Anyway, thank you for the quick replay.