HTTPS Everywhere breaks sl.se (Stockholm public transport website)

HTTPS Everywhere breaks the website of Storstockholms Lokaltrafik AB (SL):

http://sl.se/ http://sl.se/en/ (English language version)

SL is a public transport operator in Stockholm, Sweden, serving about 675,000 passengers or 2,3 M trips daily, so this website is kind of important.

The main page is supposed to automatically display a list of matching stations when you enter a station name in the input fields (e.g. "Globen" or "Gullmarsplan"), and when you hit the Search-button, a list of available travel options should pop up at the bottom of the page. None of this happens with HTTPS Everywhere enabled. Tested on FireFox 30.0 with HTTPS-E 3.5.3, using Windows 7.

I plan on contacting SL's customer services on-line with this information, and hopefully they'll resolve it. I guess it wouldn't hurt if more people than me complained, if this isn't resolved (within a reasonable amount of time)...

SL customer service: http://sl.se/sv/kundservice/