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2 PCs. Firefox 4. One was Windows 7, one was XP, Sync worked. Replaced XP PC with 7 PC, Sync encounters errors.

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Sync was successful during initial setup, but since then, continually get "Sync encountered an error while syncing: Unknown error. Sync will automatically retry this action."

Sync was successful during initial setup, but since then, continually get "Sync encountered an error while syncing: Unknown error. Sync will automatically retry this action."