barbaz wrote:could you leave NoScript updated, try again to use the calculator with NoScript enabled, watch it fail, and post here any related messages you see in the Error Console (Ctrl-Shift-J)?
Thanks, I've just done that, same behaviour occurs. It seems to be blocking some XSS, as the console had these entries in the Messages section (cleared the console first, reloaded page, then these appeared):

(posting the text seems to trigger the forum spam filter, hence a screenshot instead)
It seems odd, as I had previously added the following exception entry in the Advanced -> XSS tab:
^http://([\w-]+\.)+?cloudfront\.net.*
(testing in RegexBuddy, that does match those URLs in the console)
Pic of my XSS exceptions:

Is there a way of disabling the XSS module, or a regex to allow everything, so I can test if that's indeed the issue?