thanks NightPhantom, thans Peltra !!

was able to fix the distortion in the head.
was a joint problem indeed.
but now new distortions are occuring other places(see images).
if possible, i would like to use IK animation, far more covenient than FK (newbie talking here).
what can i do to fix these distortions?
i am using rigid bind

skol,

luk

ps: to the mod, i you feel this kinda posts belong in the newbie forum instead of here, just let me know