EtherDelta's DNS server potentially hacked. Do not use until further notice!
This from their tweet:
2:34 PM - 20 Dec 2017 "Dear users, we have reason to believe that there had been malicious attacks that temporarily gained access to @etherdelta http://EtherDelta.com DNS server. We are investigating this issue right now - in the meantime please DONOT use the current site.
"