Tried several combinations
I have now tried several combinations of deleting data and/or storage for my Google Gmail, Calendar and Contacts. In all cases, re-enabling background data transfer resulted in a the sync problem. Finally I left background data sync ON, but turned Auto-sync OFF. That also seemed to stop the problem.
I also tried deleting data, powering down the phone, removing the battery and re-enabling background data sync after the power up. Same results.
I did notice that the Calendar storage dropped from 4.33MB to 724KB, Contacts dropped from 8K to 4K and Gmail storage dropped from 60KB to 50KB. The other storage values remain unchanged.
I also watched the sync progress (touched the gmail account under manage accounts) - There are three items listed in sequence
Contacts
Calendar
Gmail
It always processed gmail first, then contacts and finally calendar, and always got "stuck" on the calendar one. The others briefly showed sync activity which ended after a few seconds. This only happens when I enable background sync and auto sync then watch the system do it's thing. I can manually sync any one of them with no problems. Very strange!
For now, I plan to leave background data sync turned on with auto-sync off. I will just have to refresh email manually and keep watching this thread to see if anyone can find the specific problem and solution.
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