I'm having similar problems. I'm seeing prims that I should not be seeing. I may be the only one who sees them but it stil lbugs me.
A screenshot I took of the feet. Same problems with my prim legs.
http://img.photobucket.com/albums/v116/Kurisu7885/Snapshot_001.png
I turn the invisiprims off and they vanish for me, yet I know others can see them.