unity messes up with workspaces

So if I understand correctly, not always, but sometimes when you click a launcher that takes you to another workspace, after that application has been focused, you find that your applications have been switched onto different workspaces? Is there and very reproducible pattern you can discern?

it happened again just a few minutes ago.

I mostly move between workspaces with the keyboard. I know where my apps are, both globally and relative to each other.
As I said, I have 6 workspaces in line. no grid, just a line. My compiz has:

===
[core]
s0_click_to_focus = false
s0_raise_on_click = false
s0_autoraise = false
s0_raise_window_key = <Control>Up
s0_lower_window_key = <Control>Down

[rotate]
s0_rotate_left_key = <Control>Left
s0_rotate_right_key = <Control>Right
s0_rotate_left_window_key = Disabled
s0_rotate_right_window_key = Disabled

[wall]
s0_slide_duration = 0.000000
s0_left_key = <Control>Left
s0_right_key = <Control>Right
s0_left_window_key = Disabled
s0_right_window_key = Disabled
===

It seems it happens when I hit Ctrl + left or Ctrl + right too fast (repeat mode, just keep the 2 keys pressed). At least I can reproduce it easily that way. I guess it occurs frequently for me because of my 6x1 line. With the default 2x2 grid, there's no point in repeating the action.

(I use a full size keyboard, Ctrl with the left hand, and the arrows with right hand, very handy to swiftly move between workspaces when I work, no need to touch the mouse)

once it started, I can also easily confuse the workspace switcher: when I drag a window from a workspace in the switcher, I see another window move in another workspace instead, from about the same offset (like 2 workspaces on the right if the workspaces have been rotated twice in the same direction).

I can confirm on my other desktop, configured the same way.

it seems it's compiz related, more than unity.

another good reason for only showing launchers of the active workspace...: https://bugs.launchpad.net/ayatana-design/+bug/683170

I assume my "s0_slide_duration = 0.000000" is making the issue easier to reproduce.

Compiz is a nightmare for me. It's getting in the way of my workflow far too often, my windows keep changing place.
I'm considering returning to Metacity, either to Classic mode (which suits me well) or to unity-2d (once its crashers are gone)

@Fabien, do you have any specific Unity 2D crasher in mind? I would love to look at them more closely and help you if I can.

the wall issue (743634) is indeed fixed but not this one.

I have compiz-plugins-main (0.9.4+bzr20110406-0ubuntu1), compiz (1:0.9.4+bzr20110407-0ubuntu2) and unity (3.8.4-0ubuntu1).
Holding Ctrl+Left or Right to scroll quickly between my 6x1 workspaces still rotates the workspaces (1 becomes 6, or 6 becomes 1, everything else shifted).

The "workspace rotation" bug also existed in compiz before natty (I think at least in maverick). Maybe that's useful info to find the cause...

The bug that can be reproduced as described in comment #8 does still reproduces on unity 3.8.12-0ubuntu1. Is a that bug reported separately, or is it still this one?

It should probably have its own bug as it roots to compiz.

@didrocks: what do you think?

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