Looks as if they released the new lootgen system even though they had reports of serious problems on Lamannia (yes, I know, they do that repeatedly), and that it's completely borked whole bunches of stuff, including items already existing.
There are reports of masterful craftsmanship disappearing from player's gear, items with +0 to stats, etc., and apparently it's messed with all sorts of things, including AH's & Cannith crafting. Not sure of the details on those last two, but they specifically listed a problem with the AH when they shut the game down today.
Looks like they outdid themselves & reached new lows with this release. They're now saying early tomorrow morning for the hot fix, but I wouldn't hold my breath.