jfbcContent only show white empty space...

Martin,
The page is actually working for me, and I'm not seeing the white space. My guess is that you may have enabled Facebook's newest option of "Use Facebook as Page" or something like that, which seems to be doing this for some users. There's a thread about this:
www.sourcecoast.com/forums/topic?id=1810

We're looking into what could be causing it, but we believe it to be an issue on Facebook's end. Please let us know if that's the problem or not, so we know where to continue investigating.

Thanks!