I'm currently riding a horse that does the silliest thing in the cross-ties. I don't know if this is a conformation fault though, or just him being weird.
He stands with his front legs closer together than his back ones, especially around the time I do his hooves. It's noticeable, and sometimes exaggerated. I haven't seen him do it at any other time though.
He's a "racing QH", whatever that means, and is pretty young.