as i mentioned here i have these spikes too.
And they are also visible, if i scan a normal pressed cd, not a recorded one.
But this spikes disappear, if i scan lower than maximum.
So i am a little bis surprised, that your spikes dont disappear at lower scan speeds and that they are at different positions. Mine were always at ~33min.
More confusing is Nero CD-DVD Speed quality test: These spikes appear as long as i scan with C1 error checkbox enabled. Its the same picture as with kprobe.
But if i disable the C1 error checkbox, these C2 errors do not appear! :eek: