So a few pages back someone was complaining about how h2o holds the coins before exchanging them... Although I agree that h2o does a decent job when it comes to exchanging, I too see a problem with this, with an example.
I check my balance/unexchanged/immature every hour or so. I checked it and my balance was .0030 (after payout of course), my unexchanged was .03195, and my immature was .01233. Now I check it, and my balance is still .0030, my unexchanged has gone down to .0254 and my immature has gone down to .0054. I understand with the immature coins you can't exchange them, but since my mature unexchanged coins didn't get auto-traded, I lost .006 btc. I understand this isn't much, but if it effects me, then I'm sure it's effected others that had a higher unexchanged balance.