Did some further troubleshooting and the difference start from block 1332352.
Block 1332351 is the same.
http://explorer.cryptopoolmining.com/block/c1ee97c8238918b76db605899e812f17fd62cb7c5387fc3fcd5701cc826b1bb1http://54.80.151.165/BlockCrawler/block_crawler.php?block_hash=c1ee97c8238918b76db605899e812f17fd62cb7c5387fc3fcd5701cc826b1bb1Block 1332352 is different.
http://explorer.cryptopoolmining.com/block/676dfbd5b44f351fe43a1fd0e295570890b8b55bedd71583e7ce4f7461339fc7http://54.80.151.165/BlockCrawler/block_crawler.php?block_hash=b35fd490a613beded6de020d7fdec3fbbb63c0a23adc3140f9118623d1987ba2It seems that the problem is in block 1332352:
{
"hash" : "b35fd490a613beded6de020d7fdec3fbbb63c0a23adc3140f9118623d1987ba2",
"confirmations" : 0,
"size" : 233642,
"height" : 1332352,
"version" : 1,
"merkleroot" : "c264f7b9f8453f1439b06d375b1be938292a98300d5b2dbd25ab3c008e3af99e",
"tx" : [
"39b61d63633b38655479664b1d3ad9620e5755d591953e2aaccbc13474a4f299",
"1a3cc1c955348d2a7af76ea459738f2a98efeadeeffdde3bd8d1c94dc12f08cd",
"c8f809e1b8473d237a4caec7c61202b6cede2429c1c38624a4168b016428ba28",
"ce04cf71b6cfb507ddf565129c74bddd79edea925f35ac7e6f5df5cf95f5896c",
"7dbd2a478a4a22c751e00e831662eae4b5d5eb192bc38a9d3dc569f88746d965",
"2d6eb59ba8139a25131ef4febd0123c00208faf8f8584296cef3ebec3327427a",
"830a7aab1ff04004d17e46a71692d11da74ccad5b7931512f4482fb7b7e44b5b"
],
"time" : 1397665532,
"nonce" : 2978415616,
"bits" : "1e04a538",
"difficulty" : 0.00084088,
"previousblockhash" : "c1ee97c8238918b76db605899e812f17fd62cb7c5387fc3fcd5701cc826b1bb1"
}
{
"hash" : "a55922b2e957f876d8143408ac442e020049b954969a668d1df2d124148e3ba2",
"confirmations" : 0,
"size" : 93912,
"height" : 1332352,
"version" : 1,
"merkleroot" : "1813ec2a72a92177e6779e2207613e0eabc799b2d9a2b5f238c4fe33c60e28b6",
"tx" : [
"190808709d8d78a957cace42ea50a1f96215018bc0163c5f2c3828ed792f52b0",
"1a3cc1c955348d2a7af76ea459738f2a98efeadeeffdde3bd8d1c94dc12f08cd",
"c8f809e1b8473d237a4caec7c61202b6cede2429c1c38624a4168b016428ba28"
],
"time" : 1397665537,
"nonce" : 3281717760,
"bits" : "1e04a538",
"difficulty" : 0.00084088,
"previousblockhash" : "c1ee97c8238918b76db605899e812f17fd62cb7c5387fc3fcd5701cc826b1bb1"
}
{
"hash" : "676dfbd5b44f351fe43a1fd0e295570890b8b55bedd71583e7ce4f7461339fc7",
"confirmations" : 10515,
"size" : 186429,
"height" : 1332352,
"version" : 1,
"merkleroot" : "c9dad72a1c427e15ab7ef53bb6cb8d2e151216a506364b11dc33796bb8d95dfc",
"tx" : [
"553d984d4602571517cf8d0a50ccfbd68a764b1d4f8bc2a97bf5264a25ff8cff",
"c8f809e1b8473d237a4caec7c61202b6cede2429c1c38624a4168b016428ba28",
"ce04cf71b6cfb507ddf565129c74bddd79edea925f35ac7e6f5df5cf95f5896c"
],
"time" : 1397665525,
"nonce" : 3253144320,
"bits" : "1e04a538",
"difficulty" : 0.00084088,
"previousblockhash" : "c1ee97c8238918b76db605899e812f17fd62cb7c5387fc3fcd5701cc826b1bb1",
"nextblockhash" : "8837e2eea34287a1a032fcabba29de5cffaac24f98ac81f216854271dafb1bf3"
}