This is why I stopped doing arbitrage like this, lol. With slower coins it was worse. Just make sure you have both DRK and BTC ready on multiple exchanges.
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2014-05-26 09:59:45 dsee - Got NEW masternode entry x.x.x.x:9999
2014-05-26 09:59:45 !coins.IsAvailable COutPoint(190c3ddd881522263aaa04f827a679f352f44137caec3d473b2de354a07eed12, 0)
2014-05-26 09:59:45 ERROR: CTxMemPool::acceptableInputs() : inputs already spent
2014-05-26 09:59:45 dsee - Rejected masternode entry
2014-05-26 09:59:45 dsee - Got NEW masternode entry x.x.x.x:9999
2014-05-26 09:59:45 !coins.IsAvailable COutPoint(190c3ddd881522263aaa04f827a679f352f44137caec3d473b2de354a07eed12, 0)
2014-05-26 09:59:45 ERROR: CTxMemPool::acceptableInputs() : inputs already spent
2014-05-26 09:59:45 dsee - Rejected masternode entry
When Date/Time Number Diff reward Who tsdiff Masternode
7 mins ago May 26 2014 18:45:41 74929 2885.379 5 miningpoolhub 40 XoAhBoEDC4TpqvQNY9LoYo1HvJqdgzhwWA
13 mins ago May 26 2014 18:39:32 74928 2827.775 6 official 50 XuyYW6RAoHNsYJhvnxR6GApgKCEJt72KCE
16 mins ago May 26 2014 18:36:33 74927 2739.655 6 miningpoolhub 5 XxvUt8uthJ3gLvcRw5Qg8fDtTkAEjBCuxw
16 mins ago May 26 2014 18:36:25 74926 2793.308 6 official 93 XsrNi8Pney4chhF8MkYRLWUyAgxniVwLGx
20 mins ago May 26 2014 18:32:07 74925 2598.626 6 pool_unknown_11 24 XsfpS5Qdmct3sDXpHxQ6tXwD9qfbDbNoUc
21 mins ago May 26 2014 18:31:43 74924 2858.894 6 official 37 XiW9uT2rYjwmWh8mHQME1cPs5eWWefTTph
27 mins ago May 26 2014 18:24:58 74923 3025.446 5 official 12 -
32 mins ago May 26 2014 18:20:14 74922 2776.481 6 coinmine 25 -
33 mins ago May 26 2014 18:19:40 74921 2587.856 6 miningpoolhub 16 Xe9i4eCsGBxF88HwcR2mekGFcctks1ZRt5
Blockheight Pubkey Votes
74922 XKJ78gUEi9UBXpfkyqYNQsa2NQ2T1pmhT 3
74923 Qc9DQ4vyHa31chps2TgrTkA7He9VwZZja 4
74925 cpTLesbwXi7WQwshgMuBPbHiUWtMTv2hS 5
74926 bYgwxiWiSoZ3nMiFJhQYGwxdVGjZc1jv7 4
74927 dLgCoTBmd8YKDJigH7oDkcdNqv3sfWYrW 2
74928 c9oxL3gW5LfpxiLZAmV6DYZ53AFKMMZMU 2
74929 UL32bgjrzAQ1PFhSvPPwWes2ifwBNVH5R 1