JFBC Fan Error

No, actually. Haven't heard of that one. If you see it again, or just want to play, try using Facebook's plugin demo page, below:
developers.facebook.com/docs/reference/plugins/like-box/

If you ever see it there, it's an issue with Facebook. If not, it may be a conflict or some other problem on your site. Feel free to post (or Private Message) the URL for your site, and we'll gladly look to see if there's any obvious problems we see.

Thanks,
Alex

Sabine,
No problem. If something stops, always feel free to pass it by us.

Glad it's going again, and I'd agree that it was likely just a temporary issue with Facebook.

Best of luck,
Alex