I have a error in freebsd 8.2, an internal system error has ocurred

[Edgar Rodolfo]

Hi guys!, i am new on freebsd, but i had installed freebsd 8.2 with
graphical interface (gnome), i was very happy, but suddendly i saw a
message, exactly the message said:
we were not expecting has ocurred ..., look the photo, i don't
understand exactly, 30 min the message appears, is dangerous the
message?

http://subefotos.com/ver/?46893c74c902254a3d7789bb38a6b457o.png