The parental filter on Sky Broadband, one of the largest ISPs in the UK, blocked jquery, the widely used Javascript library, without which many websites cease to operate. While the block was in place, Sky advised customers that they could get the Web back by disabling the filter, or switching off the "phishing/malware" category.
UK Prime Minister David Cameron has unilaterally decreed that these parental filters will soon be switched on by default for all broadband customers in the UK. But don't worry, the Great Firewall of Cameron won't make any mistakes, because the PM has decreed that Web companies must:
a) Censor all the bad things, but;
b) Don't censor the good things.
Whew, that's a relief.
code.jquery.com may not sound like a mainstream website, as it is really aimed at web and javascript developers but it is pretty common for websites to link to the released javascript (.js) files for jquery and a host of other tools on jquery.com as the site is a CDN for these files, the result being that it is possible many sites may not be performing as expected today.
The advice appears to be for Sky customers to log into their web account, and in the Sky Broadband Shield section turn off the Phishing/Malware filter, or alternatively disable the shield completely.
Sky parental controls break jquery website [Andrew Ferguson/Think Broadband]
(Thanks, Dave!)
