Very very nice. One of the best I've seen.

Why you have KDE4.* desktop upper the gnome3 shell
Please tell me how did you done this?

its abit difficult to get it all working smoothly but you make gnome-shell run as your default window manager under kde.
1.: Deinstall metacity, link /usr/bin/gnome-shell to /usr/bin/metacity and make metacity default wm under 'default apps' under kde system settings then add 'gnome-settings-daemon' as startup application in KDE systemsettings
Or
2: make file /usr/bin/metacity and add :
#!/bin/bash
gnome-session --session=gnome
#EOF

Then 'chmod oug+rx /usr/bin/metacity' in terminal (no quotes) and make metacity default wm.
Then logout + login.
P.s it is impossible to logout of the session using gnome-shell under kde (kde is owner of 1st/root session) so use kde logout widget or type 'logout' in search+launch
And:
3.: use tweak-tool to disable file manager handle otherwise it will mess up kde (dolphin is better anyway)
It is a bit more difficult to make them reflect the same wallper but i ave a startup script to do this