Created attachment 686921 [details]
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0
Build ID: 20121119183901
Steps to reproduce:
Sync attempts fail after attempting to add a bookmark. Symptoms persist across multiple devices.
Bookmark menu is devoid of bookmarks suddenly on all devices associated with Sync account.
Message: Sync encountered an error while syncing: Unknown error. Sync will automatically retry this action.
Error log indicates that a bookmark item is most likely to blame.
Bookmarks should sync properly across all devices. Sync should either function or give a meaningful course of action or information.
Week elapsed. Error still remains.
Your bookmark database has become corrupted in some way, most likely by a 'root' being deleted.
Please see Bug 817445 for more, including recovery approaches.
*** This bug has been marked as a duplicate of bug 817445 ***
*** This bug has been marked as a duplicate of bug 670069 ***