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Unable to open my webmail mailbox at TalkTalk. Can log in but get "You have undefined new mails in your inbox". No problem opening mail with IE8

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Running Windows XP/SP3. Everything worked well with FF3.6 but today downloaded FF4. Now I cannot access my webmail using FF - I can log in OK and can see that I have mail in my box but as stated above, get the message "You have undefined new mails in your inbox" instead of the usual message informing me how many messages are in my box.

When using IE8 everything works as normal.

Running Windows XP/SP3. Everything worked well with FF3.6 but today downloaded FF4. Now I cannot access my webmail using FF - I can log in OK and can see that I have mail in my box but as stated above, get the message "You have undefined new mails in your inbox" instead of the usual message informing me how many messages are in my box. When using IE8 everything works as normal.

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Further to my question. I am running AVG 2o11 (which worked perfectly well with FF3.6) which I am not prepared to switch off in order to attain compatibility with a browser.

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Where can I find a simple solution to this problem!! Why send solutions by email when I can't get into my email!

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