Mass Effect 2 PS3 Corrupting Saves

A large number of reports have been coming in that Mass Effect 2's PS3 port makes the console freeze up, only to have the player discover upon rebooting that the game's save files have been corrupted. BioWare is trying to track down the problem, and producer Jesse Houston has posted a request for further details if this has happened to you so that they can track down the issue.
Specifically if you can say:

1> where the crash occurred that caused the save to become corrupt (ie loading from Horrizon to the Normandy or Right after the fight with the Yahg)

2> How many levels in a row you played beforehand (Ie you played through the prologue through to Horizon in a single sitting)

3> How long you were playing concurrently beforehand (ie you had the game running for 40 hours straight without rebooting the console)