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Firefox Sync is not working any more (Mac)

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Hi. I'm using sync on Mac OS X and W7 and it worked fine until yesterday. Now on my Mac I receive an error message stating that it cannot connect 'cause of an invalid server-config. W7 is working fine. Can I change that anyhow? Does anybody else have the same problem? Appreciate any help.

My setup: Mac OS X 10.6.7 Firefox 4.0.1 Windows 7 all updates included

Hi. I'm using sync on Mac OS X and W7 and it worked fine until yesterday. Now on my Mac I receive an error message stating that it cannot connect 'cause of an invalid server-config. W7 is working fine. Can I change that anyhow? Does anybody else have the same problem? Appreciate any help. My setup: Mac OS X 10.6.7 Firefox 4.0.1 Windows 7 all updates included