I've got something smiliar, but instead for example when you autowalk or just walk with your arrow keys the char stops for a split second (like if you send a change direction packet while walking).. And no, anti-idle isnt activated
It dosnt do this while running around without xenobot
I hope this isnt CPU or GPU related, currently running an I7 2600K, 2x Nvidia 460 GTX in SLI, 8gb 2666mhz ram, Intel Sata6 SSD Drive etc (what im trying to say is - my computers specs aint the problem here, or atleast shouldnt be

)