I think I finally got my kobo to sync, and I think I've experienced at least 3 bugs.
- Conflicts between the calibre shelves on the device and the cloud shelves cause sync to fail
- When a sync is failing, the sync does not stop even if the cancel button is pressed and wifi is turned off; it seems to stop only after a time out.
- Wifi can fall asleep and turn off while the sync is in progress if it takes too long and then it times out without completing.
I finally got a sync to complete by clearing the shelves and then using devmode to force wifi on until it finally finished. After the sync, a few more shelves showed up, and I went into calibre and fixed some case duplication issues and then re-cleared them on the device. It still takes a long time to sync, but at least it is finishing now.
The first one I'll just have to watch for and be careful when I rename stuff.
The second two seem to be kobo bugs, but considering it is triggered by having a huge number of shelves added by calibre, I doubt kobo would be very receptive to a bug report. Suggestions?