Comment 20 for bug 1007109

Steve,

Valid settings for the ignore-hosts key is a list of hosts to ignore. To workaround the issue you're having, you can just reset the value using:

$ gsettings reset org.gnome.system.proxy ignore-hosts

For me, that results in the following proxy settings:

$ gsettings list-recursively org.gnome.system.proxy
org.gnome.system.proxy autoconfig-url ''
org.gnome.system.proxy ignore-hosts ['localhost', '127.0.0.0/8']
org.gnome.system.proxy mode 'none'
org.gnome.system.proxy use-same-proxy false
org.gnome.system.proxy.ftp host ''
org.gnome.system.proxy.ftp port 0
org.gnome.system.proxy.http authentication-password ''
org.gnome.system.proxy.http authentication-user ''
org.gnome.system.proxy.http enabled false
org.gnome.system.proxy.http host ''
org.gnome.system.proxy.http port 8080
org.gnome.system.proxy.http use-authentication false
org.gnome.system.proxy.https host ''
org.gnome.system.proxy.https port 0
org.gnome.system.proxy.socks host ''
org.gnome.system.proxy.socks port 0

We, as SSO client providers, will improve the parsing to these parse errors are not propagated to the end user.
Thanks a lot for your feedback and help!

Natalia.