Second attempt at posting, prior post did not appear in the forum.
I couldn't resist moving from Mint 13 to Mint 14 so did a clean install of Mint 14 Mate 64-bit a couple of nights ago. Things went well for the first 24 hours, but since then Mint displays no panel, power management has reverted to defaults, desktop appearance has reverted to defaults, and there are no icons on the desktop including drive icons. I can access a terminal from the desktop's context menu.
Any suggestions on how to tackle these issues? My Google-fu is not working for me tonight. Grateful for any guidance.