glitches when dragging windows

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https://bbs.archlinux.org – I fairly new to arch been using kde and decided to go with xfce and when dragging any windows around horizontally the left and right edges glitch and look pixelated.  this does not happen when dragging vertically nor did I have this issue in kde.  I thought it was x confing had xorg.conf generated my nvidia and every thing looks proper, but still can't figure this out.  also tried to see if this happens in mate and gnome and it does, but not in kde, so I'm totally confused graphicscard gtx 460monitor HP 2311xi ips led haVok1701 https://bbs.archlinux.org/profil (HowTos)