The default printer in Red Hat Linux 7 was 'lp'. I think that Florence is probably the wrong time to be changing it to 'pr'.. Also LPRngTool guesses that you want to call your first printer 'lp'.
This defect is considered MUST-FIX for Florence Gold release
Right, well we aren't shipping LPRngTool, and printconf doesn't have a default printer, it relies upon LPRng's defaults.