crawler: inconsistent data from different servers

[wander]

Despite identical SOA serial the servers for com.br seem to deliver inconsistent NSEC records:

#?>!..#?=!..#?=!..#?.<!.#?.<!.#?.>!.#?.<!.#?>!..#?=!..?=!..#?Inconsistent cut with serial 2013052006 FJ320K92T96U622KMLPLI8KRC2OQH838 FJ3524MSF0JTG389DUBHF30T6AHU0POI
Removing old NSEC FJ344Q41S6Q2UR5030B45N82SL182QSM FJ3I66HU4M31SQ64J19F1UHDLRH5682U oldserial 2013052006 newserial 2013052006
Replacing 1 ranges with gap
Cutting 2 gaps with FJ320K92T96U622KMLPLI8KRC2OQH838 FJ3524MSF0JTG389DUBHF30T6AHU0POI
Removing (NSECName(FJ320K92T96U622KMLPLI8KRC2OQH838), NSECName(FJ344Q41S6Q2UR5030B45N82SL182QSM))
Right cut (NSECName(FJ344Q41S6Q2UR5030B45N82SL182QSM), NSECName(FJ3I66HU4M31SQ64J19F1UHDLRH5682U))
!..#?>!..#?.<!.#?.<!.#?.|!.#?.<!.#?|!..#?|!..?|!..#?|!..#?Inconsistent cut with serial 2013052006 FJ344Q41S6Q2UR5030B45N82SL182QSM FJ3I66HU4M31SQ64J19F1UHDLRH5682U
Removing old NSEC FJ320K92T96U622KMLPLI8KRC2OQH838 FJ3524MSF0JTG389DUBHF30T6AHU0POI oldserial 2013052006 newserial 2013052006
Replacing 1 ranges with gap
Cutting 2 gaps with FJ344Q41S6Q2UR5030B45N82SL182QSM FJ3I66HU4M31SQ64J19F1UHDLRH5682U
Left cut (NSECName(FJ320K92T96U622KMLPLI8KRC2OQH838), NSECName(FJ3524MSF0JTG389DUBHF30T6AHU0POI))
Removing (NSECName(FJ3524MSF0JTG389DUBHF30T6AHU0POI), NSECName(FJ3I66HU4M31SQ64J19F1UHDLRH5682U))

• Notify operator of possible fault?
• Add feature to prefer smaller (more specific) NSEC3 range in case of identical SOA serial?