Now what KS has to do with it is that 7 songs have clipping in their waveforms, which is NO GOOD. (Luckily though I don't think any of the songs have any dynamic range compression)
Moment of Decision
Out of the Loop
Shadow of the Truth
The easiest way to do this would be via WaveGain (with settings @ 24bits or higher + no dithering), which you would apply before the OGG vorbis conversion.
If you want more proof, I can put up waveform image comparisons of the clipped vs declipped versions - it'll be nowhere as good as the original unclipped waveforms, but it's the closest we can get. It's a total pain for me to make the comparison, but if means getting unclipped audio and KS, it's definitely worth it.