apt,wget ignore $no_proxy

Binary package hint: apt

Hi, I'm living in a dormitory of a university, I'm running Edgy.
I'm connected to the inet over the university-network with a traffic limitation(only to external networks).
The University has a web-cache and a Ubuntu mirror server(Cache misses count for the traffic quota).
I setup the web-cache in gnome-network-preferences WITH ignore rules for the local network.

Yesterday I exceeded my quota, i wondered where all the traffic came from.
Today I run a apt-get update, this should still work because the server is in the university-net.
This is what happens :
0% [Verbinde mit www-cache.**.de (**.**.120.30)]

If I set the Proxy settings back to direct connection it works fine.

same with a wget to the uni-ftp server OVER HTTP.
Auflösen des Hostnamen »www-cache.**.de«.... XXX.XXX.120.30,
Verbindungsaufbau zu www-cache.**.de|XXX.XXX.120.30|:3128... fehlgeschlagen: No route to host.

over ftp it works fine, but as i found out $ftp_proxy is not set by gnome-network-preferences.

oliver@m:~$ echo $no_proxy
localhost,127.0.0.0/8,*.local,XXX.XXX.0.0/16,*.uni-XXX.de

oliver@m:~$ echo $http_proxy
http://www-cache.**:3128/

ftp,https,socks are not set !?

Can anybody confirm this bug?