Unchecking "Restore windows when quitting and re-opening apps" under
System Preferences -> General doesn't work - for example, when I re-open an app (e.g. Preview) it restores a window (call it 'PDF 1') I had open before quitting that app. (At least when I quit it by logging out, even with 'Reopen windows when logging back in' unchecked.) Any pointers?
I've found people describing similar problems, around the web and on StackExchange (in answers/comments, but not dedicated questions). But no answers that work for me. I've tried the solutions suggested at Disable resume for all apps in Daniel's answer (after which ~/Library/Saved Application State/ has stayed empty) and joelseph's comment on his answer.