Hello, some skills you can use on players and doesn't make you flag (pvp) and you can pk players without get flag.
Class tested Duelist.
red doesnt makes you flag
green makes you flag
Triple Slash (skillid:1)
Sonic storm (skillid:7)
Sonic buster (skillid:9)
Triple Sonic Slash (skillid:261)
Double Sonic Slash (skillid:5)
Sonic Rage (skillid:345)
others classes like dreadnought have this bug too, wild sweep doesnt makes you flag in pvp, spike thrust makes you flag
archers have this bug too, double shoot, stun shot doesnt makes you flag in pvp, lethal shot makes you flag
Other rare bug it's some skills who doesnt makes you purple makes damage on characters white, and others ones you can use and don't makes you purple BUT DONT MAKES DAMAGE until enemy is purple :S
if you don't understand i can explain better, my english is bad