Workaround for now: switch to Basic Mail - sign in to Yahoo! Mail, move your cursor over the gear icon top right and select mail options. Scroll all the way down on the "general" options page, check "basic mail", click save. There have been reports by other users that this works...
Comments
Yahoo is aware of the problem, but so far they weren't able to fix it:
http://uk.answers.yahoo.com/question/index;_ylt=Ao...
Workaround for now: switch to Basic Mail - sign in to Yahoo! Mail, move your cursor over the gear icon top right and select mail options. Scroll all the way down on the "general" options page, check "basic mail", click save. There have been reports by other users that this works...