I had something similar where whenever a wide faced terrier would bark at me;
I had a Staff Infection.
( Donkey Gums @mattcomedy, Wed 17 Jun 2009, 12:31, archived)

arf.
and also woof.
( the mighty badger Aphrodite, on a bar stool, by your side, Wed 17 Jun 2009, 12:34, archived)