Within the first second there is a tick which sounds like the track is a bit damaged. I downloaded the MP3 version and it is still there.

I probably would let it slide if the OST was free, but I did pay extra to get it; and if bringing it to GOG's or Obsidian attention might increase the odds of it being fixed; I feel it is worth making a post about it.

I haven't looked in depth at other tracks to see if there are other inconsistencies buried a bit deeper into them, but this track is pretty obvious and you can hear it yourself if you try it.

EDIT:
Damn found another inconsistency in the track 17 -"Twin Elms" at about 1:05-1:06. Less obvious than the above, but I haven't played thoroughly through the tracks, so I think it likely there are more problems

If you want GOG's attention go here.

Thanks for the link (alright, I was being lazy, but you gave me the push I needed!), so i've done this now.

After spotting the second audio artifact above, i'm quite a bit more upset about it now as they are quite distracting and certainly take from the enjoyment of listening to the soundtrack.

I was still hoping to have some additional confirmation from others that they experience the issue.

Just checked again (downloaded new copy of FLAC sountrack from GOG), and as of today the audio artifacts are still present.

I have once again updated my post on Obsidians technical support about the same issue, but I don't hold out much hope of them ever fixing this.