The gunwitch default skins headpiece "Sharpshooter's Star-hood" has her hair clipping through while using the vroom-broom skill.
With the "Black Magic Ops" skin both the "Quick Scope Goggles" and "Keen Eyes" headpiece skins don't have animated hair (the ponytail) while using vroom-broom anymore.
Sidenote: maybe an additional bug report section specifically for graphics would be handy? Since these aren't really user-interface related.