Low quality window switcher icons in Gnome 3

As evident from the screenshot, the icons for Google Chrome, Terminal and Emacs are fine.

This means that the resolution of icons used in other applications is low. Hence when they are scaled to a bigger size, the quality degrades.

There is no problem in Compiz or any other package.

You can either manually replace the icons with higher resolution/scalable icons or use an icon theme.

Only for example: You can try Faenza Icon Theme. Instructions given on: http://www.liberiangeek.net/2011/11/install-and-enable-faenza-icon-theme-in-ubuntu-11-10-oneiric-ocelot/.

The solution described in this post is explaining why you could get blurred (or pixelated) icons when doing alt-tab switching, and present a solution on how to solve it.