Hi Peter,
You should make sure that you're using the
api.twitter.com domain and a version number in your URLs -- instead of the API call you're making, it should be to
https://api.twitter.com/1/followers/ids.json -- you aren't using the API correctly otherwise and can have issues like this and countless others effect you as a result.
The relocation to the
api.twitter.com domain and version "1" of the API occurred almost two years ago -- please review your code and migrate all usage of the API to the correct endpoints.
Also, I notice that you're passing an oauth_body_hash parameter which is not valid OAuth 1.0A but belongs to an extension to OAuth that Twitter does not support. I recommend suppressing the usage of that parameter in calls you make so that it doesn't further complicate your use of the API.