I upgraded Ubuntu from 10.04 to 11.10 (through 10.10, 11.04). I had no problems with 10.04.
I did necessary Script-Fu adjustments, set my preferable appearance, worked with Firefox and Thunderbird. At one moment I pressed Alt+F4 (Windows habit) and suddenly application closed (as expected) and Launcher disappeared as well as top desktop menu (File Edit View Go Bookmarks Help). There was just plain wallpaper background.
Reboot didn't help much. Still there was no Launcher. Top desktop menu (File Edit View Go Bookmarks Help) was there (but without icons, clock, net, shutdown). Using the menu I can start applications from /usr/share/applications. This is how I'm using Firefox right now.
I tried to reboot from previous Ubuntu installation but it didn't work out.
Is there any kind of Repair action I can use?
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