OKAY EVERYONE
I've been testing this in lonely mode and the no gravity all the time problem is caused by enabling spacebuild in the addon list. I'm working on fixing it. For now, work around it by not enabling Gamemode_Spacebuild when starting freebuild server.
Edit:
Found a fix in the rampage server.cs file, modded to work with SB:
if( $GameModeArg !$= "Add-Ons/GameMode_Spacebuild/gamemode.txt" )
{
error( "You can't use spacebuild in custom games, you big tin of beans!" );
return;
}
Either add that (^) to the START of the server cs or redownload the spacebuild file about 10 minutes from when you read this (I gotta upload it)
(Fix untested)