1. OnePage Checkout is using the "Shipping Origin" adderss to default Billing/Shipping address during checkout. Change the default to blank or addresses from cache.
2. We have some custom validation code in Cart and Checkout pages. There is potentially a bug that's suppressing ShipSync (FedEx) address validation error messages. Requires debugging and fixes.
3. External web site references are making IE displaying "secure content" messages. Find and remove unnecessary external web references.
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