Zotero won't sync

I have 789 items in my Zotero library on the local machine. There are only 34 items in my online library, the last updated on 4/29/2009. Sync fails after about 10 seconds of trying. If I try to Restore to Zotero Server, I get "Error processing uploaded data Report ID a24b1b8b". If I run error reporting, I get Report ID 1796930414. How can I get sync to work?
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