[Plugin: Sociable] Sphinn Never Seems to Work

For the past month, I’ve had problems submitting anything to Sphinn via the Sociable plugin. I always end up on some Sphinn error page, or it tells me that the article has already been submitted. It provides a link to the original submission which is an error page saying the link no longer exists.

Have you seen this before, and is it a problem with the submission to Sphinn or is it a Sphinn problem only?