Yahoo email problem: Insertion of "Me" after the word "To" in all out bound emails.

This problem started with Yahoo's last update to their email program. Yahoo has been unresponsive so far to my question to them about this. Here is the only listing of the problem I could find: http://ca.answers.yahoo.com/question/index?qid=20131008140714AAkBIu0

 

Is this a malware issue? Any ideas?

 

Thanks

 

Chase