If a defined network host is the only 'source network' specified in a proxy profile, then attempting to delete it from Definitions >> Networks causes the message 'Unable to complete backend request. Please click Shift-Reload...etc.', if you 'OK' the 'Proceed with deletion' message.
The 'Unable to complete backend request' seems to occur because of the attempt to save the affected proxy profile with no source network specified. Of course, there is no real reason why you'd want to store a proxy profile with no source network. What seems a little misleading is being given the option to proceed with the deletion of a network host which is still in use, when in fact it can't be deleted because of the dependancy of the proxy profile to which it is assigned.
Getting a JavaScript error "One of the values you entered is syntactically or logically incorrect." instead of a failing connection to the confd backend.
