Incompatibility with admin:hover

When enabling admin_hover module, I've got some issue in my layout design. I've took some time to discover where came the problem, and it seems to be the admin_hover.css fault:

It set to each node :

.has-admin_hover {                                                              
  position: relative;                                                           
}           

But.. the Zen's default node is not relative, isn't ?

I had to set

.node /* Node wrapper */ {
  position: static; /* Force value */
}

in nodes.css of my subtheme to handle the issue.