invalid version specified

That error message appears when the Facebook Javascript library is included incorrectly on the page. Generally, this shouldn't happen with JFBConnect, so I'm assuming it's another extension adding the incorrect tag.

Please let us know the URL we can test on, and we'll gladly look. Or, you can.. just open the source HTML and search for 'sdk.js'. You should easily see the block from JFBConnect and likely another block from a different extension. If that's the case, you'll need to disable the Facebook Javascript inclusion in that extension.

Thanks,
Alex