Version:            (using KDE KDE 3.1.93)
Installed from:    Compiled From Sources
Compiler:          gcc 3.3.2 built from source
OS:          Linux

These two icons are missing:

$KDEDIR/share/kdeclassic/16x16/apps/package.png
$KDEDIR/share/icons/kdeclassic/22x22/actions/bookmark_folder.png

However they do exist in the respective crystalsvg versions.

What happens is that when you choose the KDEClasic icon theme that you get the CrystalSVG icon for these two icons.  

NOTE: There may be other instances of this but these are commonly used icons so they were easy to spot.

This shouldn't happen if the search order is correct. 

Since KDE can now dynamically resize an icon, it should look for a different size icon of the same theme before it takes a different theme icon of the requested size.