Yeas, it falls back to N=10. Maybe it needs some more parameters tweaked down.
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ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
received block c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
Warning: Local node 127.0.0.1:40901 misbehaving (delta: 50)!
received block c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
Warning: Local node 127.0.0.1:40901 misbehaving (delta: 50)!
2014-07-04 18:30:31.058385
2014-07-04 18:30:31.058492 GOT BLOCK FROM MINER! Passing to bitcoind! c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
2014-07-04 18:30:31.058543
2014-07-04 18:30:31.062000 GOT SHARE! SWadduPrZ4f7gGd52LetUKBzTfcM7tzdxC 6912ad68 prev 4b564daf age 192.16s
2014-07-04 18:30:31.064702
2014-07-04 18:30:31.064799 GOT BLOCK FROM PEER! Passing to bitcoind! 6912ad68 bitcoin: c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
2014-07-04 18:30:31.064860
2014-07-04 18:30:31.070246 New work for worker! Difficulty: 0.007324 Share difficulty: 0.007324 Total block value: 100.000000 SPEC including 1 transactions
2014-07-04 18:30:31.080283 > Block submittal result: False (u'rejected') Expected: True
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
received block c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
Warning: Local node 127.0.0.1:40901 misbehaving (delta: 50)!
received block c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
ERROR: CheckProofOfWork(algo=10) : hash doesn't match nBits
ERROR: CheckBlock() : proof of work failed
ERROR: ProcessBlock() : CheckBlock FAILED
Warning: Local node 127.0.0.1:40901 misbehaving (delta: 50)!
2014-07-04 18:30:31.058385
2014-07-04 18:30:31.058492 GOT BLOCK FROM MINER! Passing to bitcoind! c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
2014-07-04 18:30:31.058543
2014-07-04 18:30:31.062000 GOT SHARE! SWadduPrZ4f7gGd52LetUKBzTfcM7tzdxC 6912ad68 prev 4b564daf age 192.16s
2014-07-04 18:30:31.064702
2014-07-04 18:30:31.064799 GOT BLOCK FROM PEER! Passing to bitcoind! 6912ad68 bitcoin: c80507ab31ddeb47fea5f30133cbc02580a8bb7442bcd92c4a4f8a636912ad68
2014-07-04 18:30:31.064860
2014-07-04 18:30:31.070246 New work for worker! Difficulty: 0.007324 Share difficulty: 0.007324 Total block value: 100.000000 SPEC including 1 transactions
2014-07-04 18:30:31.080283 > Block submittal result: False (u'rejected') Expected: True
// primary version
BLOCK_VERSION_DEFAULT = 2,
// modifiers
BLOCK_VERSION_AUXPOW = (1 << 8),
// algo
BLOCK_VERSION_ALGO = (15 << 9),
BLOCK_VERSION_SCRYPT = (1 << 9),
BLOCK_VERSION_GROESTL = (2 << 9),
BLOCK_VERSION_SKEIN = (3 << 9),
BLOCK_VERSION_QUBIT = (4 << 9),
BLOCK_VERSION_X11 = (5 << 9),
BLOCK_VERSION_QUARK = (6 << 9),
BLOCK_VERSION_GROESTL2 = (7 << 9),
BLOCK_VERSION_BLAKE256 = (8 << 9),
BLOCK_VERSION_X13 = (9 << 9),
BLOCK_VERSION_SCRYPTN = (10 << 9),
BLOCK_VERSION_KECCAK = (11 << 9),
// primary version
BLOCK_VERSION_DEFAULT = 2,
// modifiers
BLOCK_VERSION_AUXPOW = (1 << 8),
// algo
BLOCK_VERSION_ALGO = (15 << 9),
BLOCK_VERSION_SCRYPT = (1 << 9),
BLOCK_VERSION_GROESTL = (2 << 9),
BLOCK_VERSION_SKEIN = (3 << 9),
BLOCK_VERSION_QUBIT = (4 << 9),
BLOCK_VERSION_X11 = (5 << 9),
BLOCK_VERSION_QUARK = (6 << 9),
BLOCK_VERSION_GROESTL2 = (7 << 9),
BLOCK_VERSION_BLAKE256 = (8 << 9),
BLOCK_VERSION_X13 = (9 << 9),
BLOCK_VERSION_SCRYPTN = (10 << 9),
BLOCK_VERSION_KECCAK = (11 << 9),