I'm able to install iPrint printers successfully on Windows 7 x64, but the driver profiles that are assigned to these printers don't appear to be taking effect. For example, one printer has duplexing (double-sided printing) enabled in the driver profile, but when I look at the printer properties, it's set to single-sided. I'm running version 5.7.8 of the iPrint client. The profiles get applied properly on Windows XP systems. Any ideas?