You are not alone.
There are some open issues like
http://code.google.com/p/twitter-api/issues/detail?id=1274
that make the retweet functionality unusable as well. Twitter always claims
that it uses the same api for its web interface as well which is not true.
On Mon, Jan 18, 2010 at 10:11 PM, Orian Marx (@orian)
wrote:
> Dear Team Twitter,
>
> I don't mean to be rude about this, but how can we expect that Twitter
> will role out an all new developer support center that's going to be
> more responsive when inquiries about a major defect in the API are
> left hanging for months on end? There is an open issue that is making
> list functionality completely unusable for a lot of people and has
> received zero comment from Twitter staff:
> http://code.google.com/p/twitter-api/issues/detail?id=1239
>
> On Jan 11, 12:22 pm, "Orian Marx (@orian)"
> wrote:
> > There has been an accepted defect in the issue tracker which really
> > should be a high priority and there has been no word of any status on
> > a fix. The defect is that any developers who cannot use a DELETE
> > request were supposed to be able to make a POST request with a
> > _method=DELETE param, but that has never actually worked. This leaves
> > list management functionality *complete broken* for any client that
> > cannot issue a DELETE request. This was first noted in November, and
> > the defect was accepted one month ago:
> http://code.google.com/p/twitter-api/issues/detail?id=1239
>