After upgrading to 9.0 Yahoo messenger chat no longer functions. The tab will flash that someone has sent a message, but there is no window to open. Also cannot choose a contact to open and start a new chat. I have filed a couple reports with Yahoo- this was their most recent reply. My answer to them is that I do not want to download another browser. I understand you are unable to use the chat feature within Yahoo! Mail. I apologize for any inconvenience this issue has caused to you. We've had reports of this from other customers and our Engineering team is already working a resolution now. We intend to have it corrected as soon as possible. The ticket number for this issue is 5282454. Currently this issue only occurs in the Firefox 9 Browser. As a workaround you can use another supported browser: Maybe you could help them fix it?