Missing Icons in 11.10 upgrade

After upgrading to 11.10 from 11.04 (I think), some of the icons such as the folder icons in Nautalus are replaced with the generic file icon... This makes it hard to navigate.

Is there any easy way to fix this?

I had the same problem on two of my computers. After a great deal of time - even a conplete re-install, I discovered that it was a simple configuration setting. Here is what worked for me:

System Settings / Appearance / Select Radiance theme

All my icons magically re-appeared.

Seem like you've got some missing them icons. Try running

sudo apt-get --reinstall install humanity-icon-theme gnome-icon-theme

If your icons are still not fixed you can also try

sudo apt-get --reinstall install gnome-icon-theme-full

You can also try removing/moving ~/.icons