Version:           unspecified (using KDE 4.5.4) 
OS:                Linux

When using Present Windows effect, all windows thumbnails are 'gray' and the window being selected has real colors. Especially when this effect is used for window switching using the standard Alt + Tab shortcut (i.e. usually without using mouse) it is quite hard to distinguish which window I'm switching to. I would be nice to have a border around the selected window. This is most visible when working on a laptop with brightness set to a low level.

Reproducible: Always

Steps to Reproduce:
1. Go to the Present Window mode
2. Try to select any window without leaving the Present Window mode


Actual Results:  
Only colors of the selected window will change.

Expected Results:  
Some other effect for selected window should be applied - probably a border.

Try to view the attached image on a display with rather low brightness level. It is quite hard to see then, that the window being selected is Google Chrome.