Don't hesitate to post your spectral/frequency things here. I think you'll find someone who's willing to have a look. It always helps to get several opinions.

These look lossy:
suspectdylantrk1.GIF
FreqSuspectDylantrk1.GIF

When I see black above 16kHz like that, and high levels beneath it, I don't feel comfortable if you know what I mean.