X: bad display name

[Maksym Marchenko]

Hello

I'm installing FreeBSD. With XFree 86, and than at the end of X session
I have always:

xauth: creating new authority file /root/.Xauthority
xauth: (argv):1: bad display name ":0" in "remove" command
xauth: (argv):1: bad display name ":0" in "remove" command

Something here isn't right. How (where) can I correct this problem.
Can (must) I edit this .Xauthority file?

Thanks in advance.