Keyboard Shortcuts Sometikmes Switch Workspaces on Wrong Monitor

[Zoffix Znet]

I can reliably reproduce this bug.

I have a dual monitor setup that use "separate X screens".

If I use keyboard shortcuts to "Switch to Next/Previous Workspace" (I've set them to CTRL+ALT+Left/Right), then I get unexpected behaviour:

1) If I press shortcuts quickly and release, as to switch a single workspace, workspaces on both monitors get switched, and after a few switches nothing happens (nothing switches until I click with a mouse somewhere)

2) If I press and hold the shortcuts, as to switch through several workspaces, it gets through 2-5 workspaces, but then stops and further keypresses do not switch anything, until I click somewhere with a mouse.

Extra note: originally I installed this as Ubuntu (with Unity) and then installed kde-full package to have KDE and this bug happens when I boot with KDE.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: plasma-desktop 4:4.8.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
Date: Fri Apr 6 07:19:35 2012
ExecutablePath: /usr/bin/plasma-desktop
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
ProcEnviron:
 LANGUAGE=en_CA:en
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: kde-workspace
UpgradeStatus: No upgrade log present (probably fresh install)