Using Firefox 4.0.1, I am unable to "Compose", "Reply" or "Forward" messages in Yahoo Mail. I do not have this problem with Internet Explorer.
Clicking on "Compose", "Reply" or "Forward" in Yahoo Mail does not do anything. I troubleshot the problem with Yahoo directly and they feel that the issue is with Mozilla Firefox. I do not have this issue when using Internet Explorer. Other buttons in Yahoo Mail, such as "Delete" and "Move" do work.
Clicking on "Compose", "Reply" or "Forward" in Yahoo Mail does not do anything. I troubleshot the problem with Yahoo directly and they feel that the issue is with Mozilla Firefox. I do not have this issue when using Internet Explorer. Other buttons in Yahoo Mail, such as "Delete" and "Move" do work.