Just a couple of things.
1 - I use Thunderbird, so I removed the mail icon from the top panel, but when I did, it also seemed to remove several other things, including the sound controller. Why is this? and how do I get it back (the sound controller and other things that were removed along with the mail icon)?
2 - I accidentally removed the networking icon from that top panel as well. Now I have no idea how to select wifi networks. How do I get that back?
I've searched through the "Add to panel..." options, but I can't see anything relating to sound or networking in there.
3. When I choose restart, the computer seems to shut down but then just hang with a black screen. In order to power-off the PC, I have to hold my finger on the power button for a few seconds. It doesn't actually go off or reboot. If I choose shut-down, it logs out and then switches off properly. Is there any reason that restart doesn't work? Is there anything I can do to get it to work properly?