FWIW, I've had trouble uploading a profile picture using the web interface itself (it seems to accept it, but then doesn't show it). It hardly seems like the most robust feature. Normally I just keep trying and waiting a few minutes to see if it actually went through.
- [twitter-dev] update_profile_image gives me head ache Einar
- [twitter-dev] Re: update_profile_image gives me head ach... Zachary West
- [twitter-dev] Re: update_profile_image gives me head ach... TjL