When we will require MySQL 5.5.3 in Piwik, it would be desired to make our database use
utf8mb4 collation. This would solve some possibly weird issues and in general, is a best practise for properly managing unicode characters in MySQL.
:+1: for this.
Just switched to MySQL 5.7 and it works fine with the new utf8mb4.
Also they plan to make this value the default in 5.8 maybe