I installed 11.10 this morning, and all seemed fine - slightly transparent windows and all. I installed it 'over the top' of 11.04 - that is, not through the update dialogue, and it worked fine.
I decided to make my launcher icons smaller, so opened CCSM, and clicked the second choice down in the left hand pane (didn't alter any settings) and it crashed completely. I had to hold the power button, and when I restarted it, all I have visible anywhere is a File Edit View menu across the top, and my Spotify icon on the desktop. Nothing to log in, log out, nothing visible anywhere, no application menu, no launcher, nothing.
I'm at a loss as to what to try. I can open a terminal, but I have tried (perhaps incorrectly) to close and restart both Nautilus and Unity, and neither did anything (assuming I was doing it right)
Any thoughts, or shall I reinstall?