If you read the comments then you'll realise it's actually Google sending down crap: I opened up Wireshark and found that IE was sending a user agent string of

If you read the comments then you'll realise it's actually Google sending down crap: I opened up Wireshark and found that IE was sending a user agent string of "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.3; WOW64; Trident/7.0)". Making Firefox use that string causes Google to mangle the page exactly as shown in your screenshot. It's apparently the "Trident/7.0" part that throws Google off, because if I manually change just that part to Trident/6.0 it works fine.