Today I was working on Active Directory project for customer and as usually in such cases I was doing some drawings with Visio 2007 to illustrate concepts and ideas. When I was trying to draw proposed site configuration I was able to place site on the drawing, but then I wasn't able to move it around on the page.
After few clicks I've discovered that site shape (from "Active Directory Sites and Services" stencil) has by default enabled protection for X and Y position. You can easily enable it by right clicking Your shape on the drawing and choosing "Format -> Protection" then clear appropriate check boxes.
To make it even more funny, as my friends from MCS has checked this is a problem only when You are using US stencils, this problem doesn't occur with Metrics stencils.