Even though the gnome-control-center panel checks the user name to not allow '-' as the first character in the name, it is probably safe to be using '--' before the user's name when spawning the command line tools to avoid any problem. So attached patch fixes it
Created attachment 48031 [details] [review] Patch to add '--' to argument builders
As I already said on irc: patch looks fine to me.
looks like a good robustness fix. thanks.
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