The big new thing in Little Pork Chop v0.57 is whitelisting. If your Twitter account isn't on the whitelist you won't be able to post. You can ask to be on the whitelist by posting a comment here. Please read the instructions carefully.
In addition, it's been built with a new set of libraries. This should be a transparent change, but you never know. Be on the lookout for problems, and please let me know what you were doing when you hit the problem, what you expected to happen, and what actually happened.
And it's now at a new shorter URL: pork.io. It should automatically redirect from the old address to the new one.