While using KDE 3.5.9 on Slack 12.1, I installed a couple of programs that I always use; very common stuff.
I don't know if that was the cause, but at some point, when I plugged in my flashdrive, I did not see it popping up on my desktop.
I looked for it on the file manager and when clicking on Storage Media, I got this message:
The KDE mediamanager is not running
-> users disk audio cdrom slocate plugdev