further to my earlier post - the update to iTunes 11.1.3 definitely did not fix the syncing problems introduced since 11.1.2
tried manual backup, then sync but same problem - sync would take forever or seem to hang on either the "finishing" step or when loading music or photos (note: I hadn't added any new music or photos, but each time it would take forever on those before hanging on the finishing step)
I did however manage to uncheck the boxes to sync all music, books an photos, then on resync those files were removed successfully from my iPhone (I left all apps installed however). Then on next sync, it proceeded quickly and finished normally. Hooray - or so I thought...
I then resync'ed only adding back my books - that went fine. but now I'm trying to resync adding back my photos - I only have 1 album of exactly 108 photos that I sync - and it took about 15min just to get past the "importing photos" message before it finally displayed the Copying photos progress bar. after that point, it did finally complete the sync without hanging on the final step.
But if I sync again without making any changes, every time it takes forever on the "importing photos" step (15min or more) before proceeding, even though there were no changes.
I've not yet tried re-syncing my music library (many GBs), but there's definitely something odd going on with sync even with 11.1.3