I have set my Task Manger to show just from "current desktop" and "current screen" but often a window from another desktop will appear on the desktop I am working on, and when I click on it "I am transported" to the other desktop - which is annoying.

A similar, perhaps related issue is that windows which should be on screen 0 appear on screen 1 or 2. The fix for this is to toggle the "current screen" settings.

I am using KDE 4.14.2 - couldn't find the version in the list above on Kubuntu 12.04. 

Reproducible: Sometimes

Steps to Reproduce:
0. Have three screens and 8 desktops. 
1. Often program on desktop 6
2. Change to desktop 3


Actual Results:  
1. Sometimes the window from program on desktop 6 is there. 
2. Click it on the Task Manger - be transported to desktop 6

Expected Results:  
1. The window on desktop 6 should not appear on the desktop 3

This doesn't always happen, and it often seems to be Thunderbird.