Those fee can't be correct can they? any tx fee is 0.05DTC? the entire blocks are only 15DTS and shrinking.
I'm sure this 0.05 is just hard-coded in the client and that in future it would be miners that set their "fee threshold" of which blocks to accept (after all, it is the miners that get the fee and pay the storage costs).
0.05 seems like the right sort of fee to me at this stage when DTC are relatively easy to get, though I suppose it all depends on how much data you wanted to attach!