Ubuntu 12.04 display problem – it shows application windows like winxp classic

How is the ride with ubuntu 12.04 precise so far? I love it.
But I added one more monitor to it and played a bit with xorg.conf> and with nvidia settings.
All worked perfect. But, when I try to view my applications like netbeans or even firefox it shows them like an old classic windows xp thing..

I solved the problem by using gnome classic :(.
Here is all you have to do to get it working

Go to your terminal and type

sudo apt-get install gnome-session-fallback

Then log out.
When the log in screen comes, click the little circle on the right top corner of the login screen and select gnome classic

DO-NE