I just ran across an issue which I have never seen before and I was unable to google anything useful regarding this as well. Basically, after I set my Unity launcher icon size to 32, the icons lost their background boxes. Uploaded image: http://postimg.org/image/mwq4crb7p/
What I was able to learn is that these images are located in /usr/share/unity/icons/ The icons do exist. (squircle_base_54.png, etc) However I'm afraid that something has broken that links the images to the launcher.
I have tried resetting the compiz config and unity with the following commands without any success:
unity-reset dconf reset -f /org/compiz/ rm -rf ~/.config/compiz-1/compizconfig setsid unity
I am running on Ubuntu 14.04LTS 64bit and I appreciate any help that can be provided as I'm not that good in Linux based systems yet. I only know the basics.