Your ls does not show incorrect permissions:
5862 0 crw-rw-rw- 1 root root Oct 10 16:25 /dev/null
The Jan 16 15:08 is the time you did the upgrade? That suggests something has run "udevtrigger" in its postinst. Could you grep for that?
Your ls does not show incorrect permissions:
5862 0 crw-rw-rw- 1 root root Oct 10 16:25 /dev/null
The Jan 16 15:08 is the time you did the upgrade? That suggests something has run "udevtrigger" in its postinst. Could you grep for that?