This whole section appears to be different from the KDE Artist guidelines for making icons and should be changed.
The guidelines state that three icons should be submitted:
If larger sizes don't render well from SVG, the Artist can also submit 32x32 and 48x48 icons.
For best rendering, all major object edges should fall on an 8 pixel boundary in the 128x128 SVG.
Strokes that are an odd number of pixels wide will need to fall on a 1/2 pixel boundary so that the edge will fall on a pixel boundary.