Nero CD/DVD Speed - "glitches removed" (and Kprobe "errors")

What the hell is that “glitches removed” thing in Nero CD/DVD Speed? I got curious after I discovered that Kprobe reported some errors on otherwise perfect burns, scanned the disc with Nero and now I see it reported “3 glitches removed”.

I have a Liteon 1693.

Here are the examples.