My cache is full, and I've tried doing "apt-get clean" to no avail. I also can't find any apt.conf file in my system. Help, please? Here is a screenshot of the error message that pops up when I open Synaptic Package Manager:
http://farm5.static.flickr.com/4056/...2678d996_o.png
PS: I'm pretty new to Linux, especially Debian; most of my Unix-like OS experience is with Mac OS X. My Musix installation is in a VMWare machine.