We are using the Twitter and Twitpic API since several months, everything was working fine - until a couple of days ago.
Since then the final upload of an image to twitpic does not work anymore. We receive the error 401 - "Could not authenticate you (header rejected by twitter)."
It seems like there is a problem by passing the oauth data, packed into the header information of the post request to twitpic, to the twitter api endpoint.
However, nothing changed on our software - even if we take an old version of our software that used to work just fine with twitter/twitpic, it does not work anymore!
Has anyone else experienced this problem?
Any suggestions / solutions are very welcome.