Originally Posted by nht
I don't recall canceling any resyncs. I just left mine running overnight since the backup was taking forever. When I came back this morning it was just sitting ready.
I suspect the issue is that the normal update process did not actually redo the photos in some cases since that would take even longer...that glacial backup was killer enough.
Well, here's what happened with mine:
I downloaded and installed the iOS4 update this morning HK time. Downloading, installing and rebooting took about half an hour. Then came syncing. After everything else synced (another 10 minutes) it gave me the notice, "Optimizing 104 of 15084 photos" or whatever it was exactly. I didn't have time to wait, knowing it would take hours, so I canceled the sync.
My iPod now had all of the thumbnails, but none of the photos in hi-res (maybe 104 or whatever it was at when I canceled, but I didn't see any).
So when I got home I plugged in the iPod and continued the process that I had interrupted. Three hours later, sync was complete, I unplugged the iPod and lo and behold all of my photos are hi-res again.