Upgraded a friend's Mega 6.3 to Kitkat I9205XXUDNE2 and rooted it using the CWM link here :
Root went thru successfully, everything works but THE CHARGING! It's been very slow since the update. I've tried 4 different cables & adapters, none made a difference. I've disabled USB debugging, wiped cache and dalvik-cache, rebooted but none worked. Can't even move up beyond 6% battery.