I just got Minetest 0.4.7. It is awesome.
However it is my understanding that I have to put in "v6_jungles, dungeons" in something called "mg_flags" within the conf file. However, that setting doesn't exist, and when I put in "mg_flags = v6_jungles, dungeons", wound up with very odd worlds.
I seem to have set it right again by restoring the original state of that file, but I am very confused now. Are jungles in this version by default? Is there a setting I missed? Ergh.
Anyway. Thanks. :)