When I sync my iPad, a random selection from each event is there after I sync. Some events seem to have all of them, some have only one (of hundreds), some have a minority percentage.
And there's no rhyme or reason – it's not the first, last, edited ones, or any other category I can think of.
I've tried rebuilding Aperture's database, turning photo syncing off, syncing, and then turning it on again, restarting, all to no avail.
I do get the "some of your pictures couldn't be sync because they can't be dispayed on your iPad, but I always do, and can't fathom that's the issue – they're standard, non-giant jpegs.
Help?
Best Answer
Well, two trips to the genius bar couldn't solve it ("you need to start a new library from scratch and retag your 15,000 photos" - WHAT?!?!), but I dug around and experimented and finally came up with the answer:
iTunes won't sync pictures without up-to-date previews; so, if they stop auto-generating for some reason, you have to force it to update previews for the pictures that aren't syncing.