Comment 1 for bug 406341

I was getting the same error.

I switched interface as described here:

"Fetchyahoo will only work if you have selected the all-new Yahoo web interface as your default. You can find out how to switch to the new Yahoo here."

http://fetchyahoo.twizzler.org/

Still got the same error. Then I tried downloading the latest fetchyahoo script and dropping it in usr/bin.

http://sourceforge.net/projects/fetchyahoo/files/

Works fine now!