Suggested advisory :
The new version 5 of minetest refuses version 0.4 clients to connect. As more and more servers are upgrading, this update allows to continue to use them.
This new version also brings a lot of enhancements, notably online content repository to install mods in a click.
Tested by myself in a 2005 i586 Fujitsu latop with ATI X700.
Connection to farm server ok, only bug found was the fullscreen resolution was resetted with the new version, had to change it manually again.
Not a Minetest player, so testing for clean 64-bit install.
Initial installation went well, as did the update. Ran the game and fooled around with a couple of things, but didn't attempt to play anything. No issues noted.
Validating. Suggested advisory in Comment 0.
An update for this issue has been pushed to the Mageia Updates repository.