After I upgraded from 1.7.2 to 1.9.1 the woocommerce cart icon located at the primary menu just missing. I already tried to search for solutions and found that it has to do with the font awesome thingy but i can’t solve it.
I just solved it now (when u just answered the question) my friend, sorry for the trouble. What I did wrong is that I disable the theme not to update. So I only updated the premium add on without update the theme and that just left me a whole day headache.