MTGox has continually thorough the shutdown made a small number of what appear to be dust-cleanup transactions. Thats all these appear to be...
Ironically, someone of them like TXID: ed7ffa58fef651adaf1281ad10e98a4399eb2be40950345c7ccb7c8f76f067e1 in their liast are spending immature coinbases (45d45286bac04311684ab7716ab170b50781cde6b094d9a644fb89ca07ae6888:31 is a coinbase with 67 confirms as I write this) and so it's not a valid transaction. So even after all this time and weeks of outages for fixes MTGox is still producing invalid transactions.
The ntxid field is somewhat new, I first noticed it there a week-ish ago.
THIS. ^ +1,000,000
I had BTC transactions stuck on Mt. Gox for almost 2 weeks before this whole "transaction malleability scapegoat" was first announced by Gox as being the cause of their transaction difficulties. The fact is, transaction malleability had nothing to do with my stuck transactions.
According to http://skanner.net/MtGox/mtgox_tx.php (back when Mt. Gox's API was providing useful information), my transactions were failing because the TX file size was too large ("TL") for the assessed fee, due mainly to the sheer vast number of dust inputs, many of which I'd wager were byproducts of addresses with immature coins.
It seems to me that spending mature coins, and/or assigning adequate TX fees for large transaction sizes would have solved this problem weeks ago. I really think that the folks at Gox are seriously incompetent, not necessarily scam artists. The whole "transaction malleability" scheme was simply a diversion to distract their angry customers from Gox's own ineptitude and/or negligence.
The fact that Mt. Gox's system is still producing invalid transactions that don't make it to the blockchain is indisputable evidence that the very problem that was preventing successful transactions weeks ago has NOT been fixed yet, despite the implementation of their beloved NXTID.
So, this is Mt. GOX's MISTAKE, and it has NOTHING to do with a problem with the BITCOIN PROTOCOL!!!
But, "Flaw in the Bitcoin System" makes a catchier CNN Money headline than "Mt. Gox Doesn't Know How to Code" and therein lies the diversion.
Mt. Gox - get your shit together an fix your broke-ass transaction problems. You are ruining people's lives because you are too smug to own up to your own shortcomings.