Possible Duplicate:
How I turn off backlight around switcher icons
When pressing ALT-TAB, the application switcher appears. You can continue pressing TAB to select the icon of the window you want to show. The "cursor" is the icons with a brighter background color, a slight glow around, and the name written below.
PROBLEM: Starting from 12.04, each icon's background has a different color.
So it is difficult to quickly tell which icon is selected, leading to frequent errors.
For instance: selected Terminal icon's background is almost the same color as unselected GEdit icon's background:
QUESTION: How to disable icon-specific backgrounds in the switcher?
Note: Icon-specific backgrounds in the launcher can be disabled. This is a different question.