Well, the 7.x branch is maintained, allegedly, by Mailchimp staff. And and error in the 6.x branch version of the API classes means that I had to use the 7.x version of that.
Nancy
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.
From: Earnie Boyd
Perhaps the Mailchimp API changed and the module bridge didn't keep up? Have you looked at their API?