Some tiled windows move when switching workspaces

[Jazzicatz]

Ubuntu 12.04.1 32bit
Unity 5.16.0-0ubuntu1
Compiz 1:0.9.7.8-0ubuntu1.4

Some windows (gnome-terminal, nautilus, maybe others) behave erratically when they are in "tiled" mode (dragged to one of the window edges/corners) and a workspace switch is being performed.
Though, it only seems to happend when you have the corners enabled in the "Grid" compiz plugin.

To reproduce:

- open CCSM and set Grid->Edges->Resize Actions->Upper Left Corner to "Top Left Corner"
- open gnome-terminal
- drag it to the upper-left workspace corner to tile it
- switch workspaces via Expo (with super-s or launcher icon)
- note how the terminal window is now on the workspace you just switched to

This is quite a pain since I'm working with tiling terminals and workspace switching a lot. It happens with all corners, though it doesn't seem to happen with windows tiled across the whole left or right side of the workspace.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.