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My friend uses firefox to email me. When I open email it seem to me that firefox blocks my Gmail. So I cannot access my gmail inbox any more. Please show me how to debug this.

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My browser is IE9. While I read my friend mails that are sent through Firefox. Suddenly I received an error message "Bad request error 400". Now I cannot access my gmail inbox anymore. I don't know what to do now. Please show me how to debug this so I can go back to my gmail because there are a ton of email in gmail inbox. Please help!!

My browser is IE9. While I read my friend mails that are sent through Firefox. Suddenly I received an error message "Bad request error 400". Now I cannot access my gmail inbox anymore. I don't know what to do now. Please show me how to debug this so I can go back to my gmail because there are a ton of email in gmail inbox. Please help!!

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The following relates to inbox problems in GMail in Nov 2011, no error 400 was seen, only a blank area where the message should have been. Since two people tied into this message this week I think theirs may be a need to update Adblock Plus filters per question 896267