DNS can be changed with apps like "Set DNS" and with the setprop command, however all fail on KitKat to modify resolvers ONLY IN CASE they were set by the mobile carrier.

An simple solutions was given at:
http://android.stackexchange.com/questions/62081/how-to-change-mobile-connectionss-dns-on-android-kitkat
in brief: put imgur's IP's in /etc/hosts

It will work, but myself, I'm still hunting a way to modify the carrier's resolvers.