I tried to auto denom 8000 TDRK to see what would happen. It sent the coins, here is the transaction http://test.explorer.darkcoin.qa/tx/2764f4fcb72357e51212edabb20e31dd014b611475d3476846cec11f2effb7c5.
If the transaction is too big, shouldn't the client just refuse the request? Maybe ask to...