OK, I really wanted to have Scribefire working, so I rolled back my site to 2.6.3, and everything is working again. I did notice that the 2.7 documentation indicated a conflict with the Flickr rss plugin (which is incorporated into Digital Statement, the template I’m using). Anyway, I’ll watch for additional comments and updates, but until I’m confident that I can maintain access through ScribeFire, I’m not upgrading.
Yes, I’m having the same issue. ScribeFire worked fine with WordPress 2.6.3, but after upgrading to 2.7, I started receiving the same error: “Server returned malformed response.”