I started to have problems with my Ubuntu application switcher (Alt + Tab) this morning. When I press Alt + Tab, not only one, but two application switchers show up. Last night I customized some stuff using the Unity Tweak Tool. I thought I didn't touch the application switcher. So now it looks like this:
Answer taken from an edit by the OP to their question:
I solved this problem by disabling application switcher in CCSM (Compizconfig settings manager).
CCSM can be installed by the following command:
$ sudo apt-get install compizconfig-settings-manager
edit for better understanding: To get rid of the switcher-icons in the foreground and only keep the standard application-switcher-icons that come with a standard ubuntu installation, disable static application switcher within CCSM. Let the keybindings solely control the functions within the "switcher" submenu of ubuntu-unity-plugin of CCSM.
