Is that a donut on the yahoo smiley?

I downloaded a new version of Yahoo Messenger last week. Now the smiley icon on the system task bar has a donut slapped on his forehead. I know I must be being dense, but I can’t work out what it is supposed to signify. Can anyone help me out here?

Hah! It is gone now! I am not sure, but I dumped the UK version of Yahoo messenger so that may have got rid of it. Maybe a UK Yahoo doper can confirm the donut spectacle? I would still like to know what it signified even though I cannot enjoy its presence anymore.