It looks like the
http://explorer.darkcoin.io/chain/DarkCoin is stuck on 75202. These are the blocks I see on the end of the chain:
75200 000000000013c3dadc5b39ea7c6f0f1e4d14cb35ba597e790e51999287b6c9ee
75201 00000000000e1624603fdb080fce25140bde67f959c67abbc87c2f827ecbc975
75202 0000000000007fc30ee7ddf106d82a80f4bdb80d189fb8ec8a80821860bba656
75203 00000000001086a2dc3911e7e8553934892c74b2034c09d17bc57bcc3477eb24
75204 00000000000a62c1fc5bc1514b45ae9d2affc528dfd2dfda0189510be90f217c
75205 00000000001fdac7753bf43d92dd52f6b22e91e9afe4b65c8f3079c487dce33f
75206 00000000001769fb9e5e8f9d9577be022d87262b2d1903d4916cb6bd8b88723a
75207 0000000000034bb26fe641000f43105ad7dfa5f3b5e314a32d02d18bc905dfb4
75208 0000000000112ee7123f0ce6855c4dd8bdf7b5823a8715e44a8fd6c9156bb08b
75209 00000000000262806b1ad744f54e2cb656b4c9e7235563295379ae68f832ecd0
75210 000000000007f092279821951a969be238572abfb1bd64551b5f4d3c0743be0b
75211 000000000005b985040571bc59bf829b703f11f0fcf660560fa4f270c28a71e6
Seems like it stuck. But dev will choose drkpool.com's block chain as main.
drkpool.com's block chain is at 75213 now.
seems like not updated to latest version yet.