Well, to be very honest, I can't be sure whether this is needed for everyone (also see
Cover art question, but I do know that
a. I just have it always like that during development;
b. with some unrelated testing the other day I found files from the drive root showing up in the CoveArt area;
c. Fidelio from the link I just gave solved his problem with it.
This stuff is kind of crazily complex because you crazies stuff the coverart in all places except where I would put it (hehe), name it like the weather tells you, and ... I didn't want to put restrictions on that all.
The main reason why this is "needed" now, is for a structure like this :
\Music\Rock\Pink Floyd\Meddle\[tracks]
\Music\Rock\Pink Floyd\Meddle\CoverArtFolder\[coverartfiles]
combined with situations like this :
\Music\Rock\Pink Floyd\The Wall\CD1[tracks]
\Music\Rock\Pink Floyd\The Wall\CD2[tracks]
\Music\Rock\Pink Floyd\The Wall\[CoverArtFiles]
The last example shows that I have to traverse up for multi volume albums.
Then think of this :
\Music\Pink Floyd - Meddle\[tracks]
and you'll see that I end up in the root at traversing up, since at that stage I don't know that Meddle is a single volume.
I only showed a few combinations/situations ... there are quite some more. But the above hopefully explains that it is already needed to have the additional level because of otherwise finding files in the drive root (and they will show up in each album then). When you don't have those files ... no problem.
What the situation of Fidelio is ... I can't tell. Of course (hehehe) here everything is allright to that aspect.