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
