APT cache could be automatically reloaded (w/o asking) for usability and convenience, unless on mobile broadband

When you change repositories and close the Software Sources window, a dialog pops-up telling you to update the APT cache. I think that it could be done automatically _unless_ the user is on mobile broadband.

If the user is not on mobile broadband I guess there is no other reason not to.

if is_on_mobile_broadband(): aptitude update
else: <display "cache not updated because you're on mobile broadband" notification>

That would be both an usability and convenience win.

ProblemType: Bug
Architecture: i386
Date: Mon Dec 28 06:08:59 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: software-properties-gtk 0.75.4
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic-pae
SourcePackage: software-properties
Uname: Linux 2.6.31-16-generic-pae i686