More additional info: when logging out after the crash, a window appears advising that the file manager is not responding and asking whether I want to log out anywyay. Forcing the logout and logging back in again does not seem to resolve the problem: Nautilus either hangs or crashes when double-cliking on a file in the Downloads directory. Other directories seem to be unaffected by the problem.
More additional info: when logging out after the crash, a window appears advising that the file manager is not responding and asking whether I want to log out anywyay. Forcing the logout and logging back in again does not seem to resolve the problem: Nautilus either hangs or crashes when double-cliking on a file in the Downloads directory. Other directories seem to be unaffected by the problem.