Save file reduced by ~half a MB
Ash piles of non-named characters are now gone
Whiterun behaves as it did when I was at 30hrs, in terms of lag spikes and framerate
Framerate in 'mass melee' combat is improved, was able to fight vs 5 spellcasters in a cave with minimal FPS loss (previously FPS would drop ~50%)
First load was -very- long, obviously some cleanup going on there. Subsequent loading times reduced by ~20%
No change in graphical quality - had to be stated before the idiots start inventing new issues
Can't comment on bookshelf etc. bugs, as I never suffered them.
My only bugged quest was 'Collect Bounty from Skald' - this still does not clear from quest log correctly, but as it wasn't mentioned in patch notes, this can be forgiven.
Note: Loading/FPS comparisons were done side-by-side on two identical PS3 160GBs - one running the previous patch and the other running 2.03 aka 1.4, so they're not just vague guesses.
More to come.
By a mod, not a Dev. They were under the impression that the whole world would be 'cleaned up' after waiting for 30 days, but that's not how the system works. Cells are only cleaned up when you re-visit them. And since re-visiting them would also spawn new NPCS, creatures etc, any file size improvements would be incidental. You can witness similiar increase/decrease in save size standing in one place and saving every 5 minutes.
As for scripts, we have access to all of them via the PC construction kit and mod tools. Very few of them have any kind of reset timer.
I'm not saying I know better than person 'X', but that particular instruction has been proven to be misinformation thanks to the PC users. I have (at a guess) over 500 hours of experience with TES mod tools myself, so I think it'd be fair to say I have a reasonably good understanding of the processes involved.
This suggests the cell cleanup processes have improved - as I mentioned above, cells are only 'cleaned up' when you visit them, not just when 30 days have passed. You would have to re-visit every cell in the game to get a clear picture of the improvements made.