Those who were logged in at the time were likely booted back to the login screen. Upon logging back in, all characters that WERE NOT ACTIVE at time of disconnect have been converted to a Level 1 Viridia Humar without a name. Those players who were NOT LOGGED IN aren't affected by this hack/bug/glitch. For your own safety, until this is dealt with and the proper characters are rolled back, refrain from logging in at all.
I repeat, do NOT log in until a confirmation is given by Larva, Lee, or other Ultima staff!