"Make a URL" link results in 404

[youngage]

Enter something in the interactive shell, i.e. "5+5" and press Enter. The result (10) is shown. Click the push pin symbol ("Make a link that evaluates the session history") and click "Make Link" in the following popup.

You will be redirected to a 404: http://live.sympy.org/undefined/?evaluate=5%2B5%0A%23--%0A

Removing the "undefined/" in the URL makes everything work as expected. I don't have an account but suspect this has something to do with non-logged-in users ("undefined" user)?

[debugger22]

It woks fine for me. I tried both the ways, logged in and logged out, undefined was never there in the url. Could you please check it again? If it still persists, what browser are you using?