Hi,

All I can say is you 're not losing your mind, I thought I was losing mine when after a few reboots my X stopped working with a message about "virtual console 7" not being available. Although I thought there are only 6 virtual consoles in "normal" Linux and I had no idea X needed a virtual console, I tried

MAKEDEV /dev/tty7

and my X was back! Losing other /dev entries sounds very, very dangerous of course, and I hope someone has an idea, maybe we can install a monitoring program that records the time, date and process that something is deleted?