FOSS gamedev and creative worlds

I moved my old world from 20120122 to 20120408 and now I cant dig anything. Anyone know why?

As of 0.4-dev_20120318, there is a "digging group" system. Mods need to be updated, else nodes cannot be dug.

edit: truncated post. :(

How do you do a digging group? Also it wasnt just mods it was the default too such as dirt stone and tree.

You have to update minetest_game as well.