iTunes can't find Aperture Library for iPad sync
"Your Aperture Library could not be found. Open the preferences window in Aperture and enable the preference to share previews with other applications."
All well and good, but when I go to the preference pane in Aperture, I do not see the referenced option. Under the "Previews" tab (Aperture > Preferences > Previews) I see the options for "Share previews with iLife and iWork" (Always/When quitting Aperture/Never)--is that the preference indication they mean? None of those options results in iTunes being able to see my Aperture library.
Oddly, Aperture can see and import photos on my iPad that are not already in my Library, but claims it cannot send photos in the other direction because the library can't be seen. Frustrating
iMac Desktop 2.8 GHz Intel Core 2 Duo, Mac OS X (10.6.6), Aperture 3.1.1/iTunes 10.1.1/iPad 3G 32GB