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Sam, Good to know. When did the switchover occur? Was something posted so we'd know?

Hey there! Our engineers have worked their magic, and we have actually just rolled out a brand new version of the MozBar - you can download it here. It's also recommended to clear your cache & cookies upon reinstalling. So far, we've had reports of great success - if you're still running into trouble after downloading the new version, please pop a message over to help@moz.com so we can collect some details from you about exactly what you're seeing:)