Hi same problem, it happens only when expand is disable in panel proprieties ( where window list applet is ) .
You can reproduce it : Enable compiz , Disable Expand in panel proprieties ( where window list applet is ) alt+f2 , enable run in terminal , paste this : echo -e "This is a bug ! \nlook window list, it disappear" && sleep 10 This bug appear if you open and closing often DIFFERENT windows. -- Window List Invisibility Issue (Programs Disappear And Come Back Randomly) https://bugs.launchpad.net/bugs/186307 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs