Fences can insert a block in you (xray)

When you rightclick on a fence, it clientside behaves as if the fence took the rightclick, and does nothing else, but serverside it places.
This messes up signs, lets you place blocks in yourself, and annoys my ocd.

See: http://youtu.be/Z79WnU7tA9w

EDIT: In 1.6.2 signs are fixed, the other parts aren't though.