Require a Guinea Pig!

Hi again!
This is going to sound random, but after some research, the best explanation we've found for that error is that there's a Javascript error somewhere on your page. Going through your HTML line-by-line, the first (only?) javascript problem we found was in this block:
var win = null;
function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
}

In the "settings" line (it's on 2 lines) the 2nd line doesn't end with a semi-colon like it should. This would be ok if it was the last line of javascript, but then there's another definition after it for "win = ", which would be bad. It's best to add a semi-colon to the "win" line as well, actually. Can you please update the line (not sure where this is coming from) to:
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable';

Hopefully that will get you going. Let us know when that's updated and we can keep looking at the code to see if there's other obvious issues.

Hrmm. Worth a shot.

We're stateside here, so this will probably be the last post for tonight. Not sure how intrusive this will be, but please try the following:
* copy the JFBCLogin module and put it in the "left" module position
* switch templates to rhuk_milkyway
* try logging in now

If possible, disable any 'flashy' modules, but since your template isn't using many of the module positions that rhuk uses, most will not appear anyways. This method will test if there are other javascript errors or conflicts in your page that we're not seeing, and at the very least narrow down the search. If it does work, then you'll need to start disabling modules and/or debugging your template to see where the conflict is. If it still doesn't work, you know where to find us. We'll get you going.

Obviously, once you test, you can switch back to your current template.

Uh oh. I just tried to go to your site and I'm getting a blank white page with the Plesk favicon.

Let us know when it's back up and if you need any more help.

Slipslide, are you still having this issue? Sometimes Facebook has 'hiccups' where things go wrong, and there's not much we can do. If you are still having issues though, let us know your domain name so we can take a peek.

Thanks!