(Continuation from above) Some 15 minutes later, after I finished writing the above post, I looked again at the system and now I had a Software Center instance running - and nothing else.
It said it has some updates, so I clicked to start installing them, before rebooting the machine. When all of the sudden all the windows appeared again, on all workspaces. I don't know if this is related to the Software Center (maybe it restarted something?), the init 3/5 I did earlier, or something else entirely. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1003057 Title: Windows disappear unexpectedly when switching application To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dia/+bug/1003057/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
