It appears that recent versions of kio-audiocd now handle computers with multiple optical disk drives by listing optical drives in audiocd:/ rather than directly listing the contents of "the" audio CD. The contents can be seen with a URL like audiocd:/?device=/dev/sr0

On my computer, I originally see a single ODD, since the PC doesn't have more. I therefore see a virtual directory named "[DRDRW - unknown vendor - ASUS   DRW-24B1ST   c]". This seems normal, but if I click on the arrow to the left of the folder icon, rather than seeing the contents of audiocd:/?device=/dev/sr0, I see the same virtual directory appear below the top directory. I can then click the new icon and produce the same behavior, presumably infinitely.

In the end, this seems to be basically a cosmetic bug. If I enter the top directory rather than click its arrow, I get the disc's contents (however, if I click one of the spurious directories, I get an error).

This is quite probably an upstream bug.
Debian Release: jessie/sid
990 testing debian.mirror.rafal.ca
500 unstable debian.mirror.rafal.ca
1 experimental debian.mirror.rafal.ca
--- Package information. ---
Depends (Version) | Installed
=======================================-+-===================
kde-runtime (>> 4:4.10) | 4:4.14.0-2
libc6 (>= 2.4) | 2.19-11
libcdparanoia0 (>= 3.10.2+debian) | 3.10.2+debian-11
libflac8 (>= 1.3.0) | 1.3.0-2
libkcddb4 (>= 4:4.3.4) | 4:4.14.0-1
libkcompactdisc4 (>= 4:4.3.4) | 4:4.12.3-2
libkdecore5 (>= 4:4.11) | 4:4.14.0-1
libkdeui5 (>= 4:4.11) | 4:4.14.0-1
libkio5 (>= 4:4.11) | 4:4.14.0-1
libogg0 (>= 1.0rc3) | 1.3.2-1
libqtcore4 (>= 4:4.7.0~beta1) | 4:4.8.6+git64-g5dc8b2b+dfsg-2
libqtgui4 (>= 4:4.5.3) | 4:4.8.6+git64-g5dc8b2b+dfsg-2
libstdc++6 (>= 4.1.1) | 4.9.1-14
libvorbis0a (>= 1.1.2) | 1.3.2-1.4
libvorbisenc2 (>= 1.1.2) | 1.3.2-1.4


Package's Recommends field is empty.

Suggests (Version) | Installed
=======================-+-===========
lame |