Version:           unspecified (using Devel) 
OS:                Linux

white flash/flicker when changing the application focus in a tab group

Reproducible: Always

Steps to Reproduce:
1. open 2 konsoles
2. right click window decor-> Move window to group
3. select the other konsole in the list
4. now there should be a window tab group with 2 konsoles
5. open a konsole tab in one of the konsole
6. switch back and forth between the 2 window tabs and I get a white flash/flicker when ever I change to the other tabbed konsole window

Actual Results:  
http://imagebin.ca/view/ksQroT.html
2 window tabs with 2 konsoles, when switching to another konsole window from the tabs there is a white flicker (whole konsole window) which is very annoying.

Expected Results:  
There should be no flicker when changing window tab groups, just like changing tabs in konsole

kde 4.5.64 today's trunk with qt 4.6.3 with nvidia binary blob (latest 256.40)