"World-writable" (777)?

No. The version reported by phpinfo() is the CLIENT version, not the server version.

Don’t know what that means. MySQL is a db at the server and should have a (server) version number. And what and where is the MySQL client with an other version? (Sorry, I don’t understand enough of servers and DBs.)

The client is the program that makes requests of the server, like your browser is your client that makes requests of the web server (apache, IIS, or whatever the server being accessed is). The browser has nothing to do with the server.

In the case of mysql (as well as most other database servers such as MSSQL), there are API libraries that can be compiled into php; php is the client making requests of the mysql server with its mysql_query() functions.

phpinfo() reports the version of the API library that was compiled into your php; this may or may not be the same as the version of mysql being used for your website.

http://faq.cpanel.net/show.cgi?qa=105519776205454

Now it’s clear, thanks. But what does it mean for juha? The API version is 4.1.15, the server version is 3.23.56.
MODx requires 4.1.x or above (server or API?).

Surftown currently supports version 3.23.56

If this is correct what this means is that they have not updated the MySQL in ages. Also 3.23 is below the MODx minimum.

MySQL 4.1.x or above.

Recommendation: contact the server support and ask them to upgrade, or, go to a better server.

Ok, thanks for the advises! I will send a message to the server support and hope they’ll upgrade the MySQL.