Anyone tried to integrate dropbox in unity?

Hi. I got a complete implementation of dropbox login/upload/download through their REST API and Unitys build in WebRequest function.

The only thing not working is the authentication and Dropbox are not exactly getting back to me. The problem is:

• User authenticates app through OAuth 2 and I get a correct key back.

• Now I want to trade the key for an access token and I get an error 500 (server error).

So while I wait for dropbox support (been waiting 3 weeks now), did anyone make this work in unity? (They did answer that they can't see what's wrong)

Thanks in advance

Odin