A controversial change was recently put into the next Bitcoin release that will effectively block any transaction with outputs less than 54.3 µBTC. The motivation behind this change was to discourage people from clogging up the blockchain with "uneconomic dust." You can read more and review the full implementation here.
We, at BitcoinGet, understand the importance of this change in ensuring the health and stability of the Bitcoin network. However, it will affect our operations to some degree. We will have to impose some threshold before pending balances get paid sometime in the near future. The threshold will be reasonably low—100 µBTC or so. For a majority of our users, this shouldn't be an issue.