Hi, I try to give my 2 cent to this situation
I bought MotA (EU version) this wednesday and I downloaded it when I've already installed the patch 1.05.
I experienced the save files corruption during my first run through the DLC (all my save files MotA related was corrupted: 2 autosaves, 1 just before the choice to go with or without Tallis, 1 just before the final fight and 1 post DLC).
Yesterday then I replay the DLC disabiliting the autosave function and reloading the save files just after each save to check in that way if the save was corrupted or not.
First I go through the Hunting Ground and the Garden without problem, then i choose to go stealthy inside the castle and I still haven't found corruption issue until the enigma with the switches.
Then, after the long cutscene and the subsequent evasion, I tried to save and reload, but the save file corrupted.
My second attempt was pointed to not collecting all the codex entries, because I noticed that the save file corruption happened just after my knowledge "codex' folder" exceeded the 100 entries (at the enigma with the switches I had 100 knowledge entries, for a total of 247 codex entries; after the evasion I had 102 knowledge entries).
However that was a wrong idea, because after completing the stealthy run inside the Chateau without collecting any entries (this time I had 94 knowledge entries and a total of 240 codex entries by the end of the enigma) the corruption still happened.
Finally I tried my third attempt and I experienced something weird.
From the garden I choose to go straight in the Chateau not stealthing anymore but fighting. I reached the enigma without any trouble, then I go into the cutscene and evaded from the cell.
The weird was that this time the save file after the evasion was not corrupted and I was able to load it every time I tried.
But from there each subsequent attempt to save result in a corrupted save file:
- I reached the vault and looted the treasures -> save file corrupted
- I ignored the vault, collected the 3rd pieces for Varric and Bethany quests, made my way through the 2 fights in the dungeon and reached the crack to the caves -> save file corrupted
- I ignored the vault, ignored the quest' elements, just foughted the 2 groups of guards (unavoidable) and reached the crack -> save file corrupted
What surprise me was that going stealthy I experienced the corruption issue earlier than fighting all the guards of the Chateau.
Ah, one last note:
I played MotA post-game and after Legacy too; moreover I imported when starting DA2 my DA:O ultimate edition's save file (made post Witch Hunt DLC).
Ps: sorry for any language mistake I may have written

'
Modifié par Nathan_Corso, 16 mars 2012 - 11:29 .