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User-Agent: Mozilla/5.0 Galeon/1.2.6 (X11; Linux i686; U;) Gecko/20020830

Description of problem:
If i configure up2date to use a proxy server, then i go to another place where
that proxy hostname is no longer valid, up2date does not run, it dies silently
without a warning or an error message.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.configure up2date to use your proxy server
2.launch up2date from the RHN applet in the panel
3.it works fine
4.go to a different network where the hostname you configured for a proxy is not
valid
5.launch up2date from the RHN applet in the panel
    

Actual Results:  nothing happens. up2date dies silently, but the user does not
get any notification on that

Expected Results:  up2date should prompt an error message saying "proxy not
available" or something like that

Additional info:

this bug is very bad for laptop users. when going to a different network,
up2date dies misteriously.
also, there are way too many places to configure a proxy server. all
applications, including the RHN applet and up2date should use the setting
configured in the Preferences / Network Proxy menu.