Unable to use https for oauth

Forgive me if there is an existing issue about this, I searched but didn't find anything.

I've been testing out the api trying to use oauth to authenticate with identi.ca. I registered my "app" with identi.ca and tried to use the Request token URL and Access token URL that are given. These urls are https.

When ever I attempt to use them i receive "invalid signature". Even when explicitly setting the signature method to HMAC_SHA1. If I use http addresses the api works.

I'm using the simplegeo oauth2 python library. This could be a bug with the library but it seems to work fine with twitter.