Getting http 400 bad request...

Using a perl API (which I know is not supported), I am all of a sudden getting a 400 Bad Request. Strange that it has worked just dandy prior to now. Curious if there have been front end changes (perhaps to cut down on potential spammers). Since I have totally moved to plurk from "that other product", I wanted to add the same content that I had there, including automated new blog entries and such (totally not spam).