I noticed recently that whenever I changed IP themes that the Library folder icons (Documents, Music, Pictures, Video) remained the same.
They appeared to be a recolorized version of icons from the "Electric Grid" IP theme.
After multiple attempts to load new themes were unsuccessful in changing the icons, I decided to remove the "Electric Grid" package from IP and set IP to Windows Default to try to get back to some other icons.
I have also tried "Repair Icon Images", "Repair Shell Icons" and "Rebuild Icon Cache" and so far all I get is:

So not only are all the individual Library icons gone, but it seems that the Library icon, the Favorites Icon, and "Recent Places" have all gone to a default icon.
Any idea how I can get IP to reapply icons to these folders?