1. Deposits work
2. Withdrawals work (if there are enough unspent inputs in the wallet that can be combined into a single transaction).
3. Canceling orders works

If you really want to be sure, just make 2 or 3 smaller withdrawals instead of one large one. This does not affect bitcoin, only some of the altcoins.
We are consolidating the dust into larger inputs to stop this issue - its nothing major, your coins are safe.