I have a same problem. My application works perfectly again yesterday via API.
Now and for a few hours, I get an error 401.
I change oAuth Token key and secret key on my api and software application, I have already same error on “Get Authorization Link” section…
After some search, I’m not sure but I think problem is Oauth version. y application use actualy .net dll (TwitterVB2). I try with other library (Flurr.dll) but result is same >>> 401 error
