I have noticed on some of the blogs I manage that the Twitter Tools Bit.ly link shortening plugin no longer appears to be shortening links. I have checked the Bit.ly username and API key and they appear correct (no spaces in the API key, not even hiding at the end of the key).
The posts that are scheduled are being successfully tweeted, however the links are not shortened. It shows the full URL, truncated with an ellipses, that is in turn a link to a t.co shortened URL. So far, nothing seems to be obviously wrong with the WordPress installations. Everything else is working as per normal.
Shortened links can be made in the Bit.ly account and then tweeted out, just not automatically from within WordPress using the Twitter Tools plugin.
Is anyone else having similar issues? Any ideas on why this might be happening and how to troubleshoot this?