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Thanks everybody!

Thanks Dana. Honestly, we have a lot of experience dealing with site migrations - I read dozens of posts and we've implemented our own step-by=step guidelines for successful site migration. As you can see, sometimes even when you do everything by the book you can encounter some unexpected issues.

Hi there, Just to add to what Martijn has said, you should be able to specify the pages that target the US with this tag and leave the pages for international users unspecified. This means creating different pages / URLs of course, rather than using IP detection which isn't advised for changing content.