Since 0.49 came out to stable, my character got deleted multiple times, most of them the server randomly restarted, and when I log on again my character is gone, and I'm a freshspawn again. I'm playing with a friend all the time and his character never got deleted, he was in the same servers at the same time as me. I already lost like 4 characters from random deletes.
Also I've noted that the servers I've played restarted a lot, so I don't think that they're scheduled restarts, I think the servers go down under stress or something or some bug like the splint throwing.
I'm playing in 3rd person, stable, servers with persistance off.