Favourites problem

I was attempting to add items to my favourites lists but at first I found that I couldn't drag items. After getting 1 or 2 added I was searching for another that would drag and recieved a big and complex (to me) error message and couldn't search for more items properly. I took a screenshot and have it on this link:

img326.imageshack.us/img326/3893/listalproblemac8.png

Please help, I'm itching to make some favourite lists.

What are you searching for exactly?

Well, in that search I was looking for "Amelie" (on the movies list) and I still get that error whenever I search for it. I think other items are working for me now though. But I can't seem to drag the books "Lirael", "Nineteen Eighty Four" and "Animal Farm" into my books list. This might be true for all books but I'm not feeling very well at the moment so don't want to try too much more.