The solution does not work anymore. The problem came back after I switched my session to enlightenment and then back to gnome. Removing .gnome2 folders doesn't solve the issue anymore.
To summarize the situation : - Alt+tab from Window A to Window B doesn't put focus on window B - to get the focus, I have to click on the window title bar. - Ctrl+Alt+tab to switch virtual desktop doesn't work anymore. - recreating the shortcut in system > preferences > keyboard shortcuts doesn't resolve anything The links provided here seems to describe somehow a similar problem : - http://ubuntuforums.org/showthread.php?t=287880 - https://blueprints.launchpad.net/distros/ubuntu/+bug/58010 -- Window don't get focus https://launchpad.net/bugs/59068 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs