It seem that all script properties are saved in the save game.
It's really bother me because mod update are really difficult with this. For exemple, if i need to change a property sound, I can't do it easly because old savegame with always refers to the old attached sound !

I recently see that autoreadonly are not saved, but seem impossible to set it with "object" properties :

Sound Property Soundtest autoreadonlySound Property Soundtest2 = none autoreadonly

Both send me a error on compilation.

So, there is no way to disable saving ? Mod update will be a nightmare ?

This might explain why people who uninstalled my old walk speed mod script were still experiencing speed modifiers. Stay classy Bethesda.

This http://www.creationkit.com/Save_File_Notes_(Papyrus)ought to give you a better idea of what happens when script data is (de)serialized.

I thought this was a given with modded save games? Personally, I *never* expect my modded save games to perform correctly after I uninstall the mods associated with them.

I guess that's just me.