User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b3) Gecko/2008020514 Firefox/3.0b3 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b3) Gecko/2008020514 Firefox/3.0b3 Errors are the following: the page at http://us.mg2.mail.yahoo.com says: Yahoo! Mail experienced a login error: name:NS_ERROR_DOM_WRONG_DOCUMENT_ERR message:Node cannot be used in a document other that the one in which it was created LineNumber:463 and: Yahoo! Mail experienced a login error: Login error: name:TypeError message:j is null LineNumber:648 fileName:http://mail.yimg.com/us.js/yimg.com/combo?/pim/r/dclient/g/js/core/40ed4e2d8d7c4fedfd40ff2da621022e_1.js&pim/r/dclient/g/js/launch/8f7e5aa4beb78311833eddc3334a14e5_1.js Reproducible: Always Steps to Reproduce: 1. go to http://mail.yahoo.com 2. enter the login information 3. when yahoo shows the webmail page the error will occure. 4. you can't select any mail

Bug 398381 may have regressed again? I'm marking this a dupe because that's a tech evangelism bug.