I see it.
I am a little confused why you cannot log in though. I can disable Flash in my browser, and the site works just fine, with the exception of the charts. I have to wonder if maybe your copy of Flash is just conflicting with something.
If you are so inclined, try adding the Flash Block extension to Firefox, and see if the Bitstamp page starts working again.
Flash block 1.5.17 makes no difference- I still get the error. I am more confused by the minute...