I'm on Linux Mint 14.1 with Cinnamon 1.6.7. When pressing the keyboard shortcut to move a window to the right, top, left, or bottom edge, the window is also moved along the edge.
When moving a window to top or bottom edge, the window is also shifted a few pixels to the right. When moving a window to right or left edge, the window is also shifted a few pixels to the bottom.
Confirmed by Nomko on this topic on the forums: http://forums.linuxmint.com/viewtopic.php?f=208&t=108505&start=20#p669376