I set up a complete new Ubuntu 12.04 LTS. On this I installed Gnome 3.4 from Official Gnome Website
At first it looked very well, like the screenshots on the Website. But since 2nd restart my Desktop looks like in Ubuntu 10... What to do?
UPDATE: After complete new installing Ubuntu 12.04 I watched step by step when "new" Gnome look dissappears. So I found out that when I start Nvidia Xserver settings first time & set my 2nd Screen (HDMI Port) from inactive to active, gnome jumps to old style, exactly as in Gerrys Screenshot. I deactivated it again, saved this to /etc/X11/xorg.conf again. But Gnome stays in old look. So I assume its something with this stuff. I am using Nvidia GeForce GT 530 & "accelerated Graphics Driver version current" (hope, I translated correct) Thanks for you help so far, hope you can solve this Problem...