While setting tracks on the timeline to NORMALIZE, some of the tracks become muted, where the waveform itself goes flatline. Burning a CD with these tracks NORMALIZE-d confirms that the missing waveforms are not transferred to CD. Once I un-set the affected tracks, the waveform(s) return, and they transfer to CD as normal. I can't tell why some waveforms are affected and others are not. Possible bug?

My system: Pentium 4 1.8GHz, 512MB
Software : CD Architect 5.2