Ho risolto: avevo installato la versione sbagliata di mysql. La 4.x invece che la 5.x



Buon capodanno

EDIT:

Adesso sembra andare phpmyadmin, ma al fondo rimane scritto:

Cannot load mysql extension. Please check your PHP configuration. - Documentation
The mbstring PHP extension was not found and you seem to be using a multibyte charset. Without the mbstring extension phpMyAdmin is unable to split strings correctly and it may result in unexpected results.
Your PHP MySQL library version 5.0.51a differs from your MySQL server version 5.1.30. This may cause unpredictable behavior.

E' normale?