Problem syncing photos from iPhoto

I have an iPhone 3GS with the latest updates and I am running the most updated versions of OSX, iTunes, and iPhoto. Obviously, I have a Mac.

Seemingly out of nowhere, iTunes has been giving me the error "iPhone cannot be synced. The required file cannot be found." I've narrowed it down to a problem with the photo syncing. If I do not sync photos, it works fine. There is also at least ONE iPhoto albums that will sync correctly. All my pictures show up fine in iPhoto, so I don't know what files could be missing.

Things I've already tried to no avail: Restarting the computer, restarting the iPhone, uninstalling and reinstalling iTunes, Resetting factory settings on the iPhone and then restoring it.

 

bump?

 

no, I haven't really messed with anything unusual in iPhoto. I tried the rebuilding of everything, but it still has the same error... Any other ideas? Also, there's plenty of room on the iPhone.