I had the same, but dismissing the error seemed to let it work just fine. Hard to see given the minimal contrast between the "X" and the modal header
Thanks, I missed the X before I saw your comment, but still, nothing comes through for me when searching in Chromium 17.0.950.0. Firefox nightly works.
Try using a different browser like Safari... it's working for me there...
Are you behind any sort of firewall that might be blocking websockets?