Reports my IE11 in modern mode as IE7.
I'm guessing it's because of the "trident" and "7.0" in the user agent: Mozilla/5.0 (Windows NT 6.3; Trident/7.0; Touch; rv:11.0) like Gecko
I've noticed a ton of sites that misdetect IE in this way. MS's attempt to 'improve' their UA string seems to have done more harm than good.