I had the same problem.

Used:

sudo dpkg --configure -a
sudo apt-get -f install
sudo apt-get update
sudo apt-get upgrade

But kept getting same errors.

Then ran:

sudo apt-get remove ubuntu-desktop ubuntu-artwork human-theme

(don't worry, removing ubuntu-desktop is okay)
Removed the three packages without trouble. Then run:

sudo apt-get install ubuntu-desktop ubuntu-artwork human-theme

It should also install a few more packages. I had 26 upgraded, 61 new install, 6 removed, and 332 not upgraded.

Then try running the four commands:

sudo dpkg --configure -a
sudo apt-get -f install
sudo apt-get update
sudo apt-get upgrade

That worked for me.

Good luck.