This plug-in overwrote all font and color settings on my client's site. Every time I had issues with the CSS the code started with "#social-" which was almost impossible to find. I installed this because my client wanted cross posting between her business FB page and her new website.
Reading all of the support posts here, it sure sounds like a plug-in to stay away from. I tried and tried to get any support from MailChimp but they finally said they don't support the plug-in and referred me to WordPress. org. Some help. If they're going to launch this on unsuspecting people, at least support it and fix all the bugs.
Worst plug-in ever!