apt fails to retireve http package lists

[eamonn.hamilton@cpmx.saic.com]

Hi.

Im using apt on a potato system, and it fails to retireve anything via
the http method.

I am on a corporate network, with http transparently being redirected
through a network appliance cache. The following results are obtained
when I try and run an update :

bash-2.02# apt-get update
Hit ftp://ftp.debian.org unstable/main Packages
Hit ftp://ftp.debian.org unstable/main Release
Hit ftp://ftp.debian.org unstable/contrib Packages
Hit ftp://ftp.debian.org unstable/contrib Release
Hit ftp://ftp.debian.org unstable/non-free Packages
Hit ftp://ftp.debian.org unstable/non-free Release
Err http://www.debian.org unstable/main Packages
  400 Bad Request
Ign http://www.debian.org unstable/main Release
Reading Package Lists... Done
Building Dependency Tree... Done
W: Couldn't stat source package list 'http://www.debian.org
unstable/main Packages'
(/var/state/apt/lists/www.debian.org_%7ejules_gnome-stage-2_dists_unstable_main_binary-i386_Packages)
- stat (2 No such file or directory)
W: You may want to run apt-get update to correct theses missing files


The sources.list file looks as follows :

deb ftp://ftp.debian.org/debian unstable main contrib non-free
deb http://www.debian.org/~jules/gnome-stage-2 unstable main


Normal web browsing works fine to the areas listed above. 

Any ideas ?

Eamonn