FOSS gamedev and creative worlds

I'm not sure if this should go in servers, but whatever.
Whenever I get on a server that is 0.4.7 or above ( I am 0.4.9, yay)
It shows a whole lot of NULL and I cannot move and only see gray. This happened when I had 0.4.7 too.

Usually the 'all gray' error is fixed for me with a simple rejoin - However, if the problem is consistent, please try switching to a newer build. I have posted one in your other thread.