<blockquote>Locking duplicate thread.<br> Please continue here: [[/questions/910948]]</blockquote> Hi, I own a website [http://www.mudpieseducation.com link text] and firefox keep having trouble login in. It has a message "HTTP Error 400. The request is badly formed." , it happen in different location that try with firefox. But when I use other like internet explorer or chome is fine. Please kindly help, thanks.