Comment 3 for bug 419194

Sounds reasonable to me; just be careful to avoid blocking in the case where the network connection is somehow broken (e.g. throws away outgoing packets but doesn't reject them).

Of course the "No changes have been made to this computer" text should be conditional on that actually being the case; some thought should be given to what we should do in the event that the user quits *after* confirming the installation summary (which of course will leave them with a broken installation, but maybe that was intentional).