Yep, it's me again. I've mostly gotten rid of the 0xc0000005 (insufficient memory) crashes, but I'm now consistently experiencing "exception code" 0xc00000fd crashes, specifically with "fault offset" 0x004a0a92. Over the past few hours, I've had these in areas near Balmora and Arkngthand, but wouldn't be surprised if they started turning up elsewhere as well. I've read that exception code 0xc00000fd crashes in general often have to do with mesh issues and/or creatures/NPCs getting stuck in the landscape, and I've definitely seen many instances of glitched collision with both my own character and other creatures (e.g. dead kwama foragers sinking into the ground after being killed, dreugh stuck in the sand at the bottom of the water, etc.).
Anyway, it's really getting gamebreaking, so any ideas would be as usual hugely appreciated. (My detailed specs/load order etc. are posted in the "Freeze on entering Sterdecan's farmhouse?" thread. However, I'm now running Morro version 0.60.) Thanks!

I finally gave up, did a
I finally gave up, did a fresh complete install of Morroblivion 0.60 from scratch (even reinstalling Morrowind/Oblivion), and started a new game. This time, I thought I'd be "safe" and limit my oblivion.ini edits to only those listed here: http://tescosi.com/wiki/Oblivion.ini. However, after a lot of testing and isolating variables, it seems the only thing that will prevent 0xc0000005 exception code crashes for me is increasing the three supposedly "unsafe" oblivion.ini variables "uinterior Cell Buffer", "uexterior Cell Buffer", and "iPreloadSizeLimit". In my last game, along with using the 4GB LAA patch, OSR, Streamline (for Streamsave/Streampurge only), etc., I was stable for many hours using these three .ini tweaks until I started getting the 0xc00000fd exception code crashes in certain wilderness cells.
So, I just can't win: not tweaking the .ini as above will constantly crash my game with 0xc0000005 exceptions, while tweaking it may eventually cause 0xc00000fd exceptions in certain areas. That said, for the playthrough where I started getting those 0xc00000fd crashes after 30 hours of gameplay, I had initially not been using OSR, Streamline, etc., and had also regularly been saving games over existing saves and loading games from within Oblivion, which I later found out were apparently things I shouldn't be doing. Also, eloth had suggested way back two years ago that similar supposedly "unsafe" .ini tweaks were OK, and some were even recommended when running his visual overhaul mod: http://morroblivion.com/forums/morroblivion/mods/1449.
So in case it's not obvious, I'm really, really confused about what I need to do to actually play this game and not constantly be worried about the next crash - or even worse, permanent corruption of all my save files after dozens of hours of playing. Thanks as always for your patience and help!