+1  A: 

Go to Tools -> Internet Options -> Advanced and uncheck the two boxes that say "Disable Script Debugging..."

Then when you get your error it will ask if you wish to debug, and then you say Yes, and it will launch Visual Studio and highlight the exact place where things have gone wrong.

You can get Visual Studio Express here.

jeffamaphone
Thanks for the suggestion. I will uncheck them for future use! For now Paolo has already fixed the issue. Thank you nevertheless.
Jannis
+3  A: 

You have an extra comma somewhere in your javascript.

EDIT:
Here are the extra commas, inside jsLinkNudging.js:

$('.categories img').hover(function() { //mouse in  
    $(this).animate({ 
        marginTop: "5px", <- remove comma here
    }, "fast");  
}, function() { //mouse out  
    $(this).stop().animate({ 
        marginTop: "10px", <- remove comma here
    }, "fast");  
});

Look after both of the marginTop you have a comma but no more properties. Remove them both.

Paolo Bergantino
Thank you very much. This was indeed the problem.I forgot to remove them after deleting the second property, that was there once upon a time.Thanks again.
Jannis
A: 

you could also check this IE only add-on http://www.debugbar.com/ it behaves a lot like firebug and has a console too

lock
thank you for your recommendation. I use firebug a lot so this should be an excellent addition to IE.
Jannis