njfl said:You might want to check to make sure you didn't get any Browser Helpers/Hijackers installed on your PC. On your IE menu bar select Tools > Manage Add-ons. You can disables funky looking ones that seem suspicious, close IE and retry what you did.
MADMAT said:It was a virus on Yahoo's side. A really nasty one too! You (and me) were seeing the results of Yahoo being infected server side.