I had no issues with a 4900 and 3880 but you should always install the latest drivers from Epson and only Epson after any upgrade to a Mac OS. Ideally of course, drivers that are said to be working withg that newer OS.
Thanks Andrew,
Oh yes, I am well aware(perhaps too well) of the fact that the latest printer drivers have to be loaded with any new OS, and also that the Epson Uninstall app should be used to get rid of the older ones first(a lesson I learned recently). Of course the latest 9900 driver(9.17) for Lion is also used in Mavericks, at least as of today. However, I would likely uninstall it and do a fresh install in Mavericks. I believe you also use the Epson V750(700) scanner, not sure. If so, are you having any issues with it in Mavericks? On the Epson FAQ page for OS upgrades one of the questions was whether or not the printer drivers should be uninstalled "before" installing the OS upgrade. Their answer was "Yes", but I'm not sure why that would make a difference.
Much appreciated Andrew,
Gary