Me too, basicly everytime I decide to write walk it means go and when I try go it means walk. :P
I was about to ask the same thing many months later. I would assume this could be interpreted either or, depending on the situation...that or there is another specific word order for 'go'? Perhaps I'll just report it
"Unable to walk" is marked wrong but "not able to walk" is correct. Is there a verb specifically translatable to "unable"?