They've change the structure of bitcoin_tx and remove some data for security purposes.. thereby hiding the stats..
< BitCoroner> MagicalTux: why can't we see the raw transactions anymore on
https://data.mtgox.com/api/0/bitcoin_tx.php ?
<@MagicalTux> BitCoroner, because phantomcircuit found a security issue with showing this
Which is complete and utter nonsense. Every raw tx ever made and which will ever be made is available in the blockchain. There is absolutely no security issue by making the raw tx known.