Hi,Dropping PHP 4 support is fine for us.But you may want to codsenir to set PHP 5.1.x as the minimum requirement for the future Mantis versions, since many enterprise Linux distributions ship with it (e.g. RHEL5 ships with PHP 5.1.6) and most providers stick to the PHP version shipped with the OS to get the regular security fixes from the vendor (at least that's what we do).CentOS 5, a very popular and free distribution, is also based on RHEL5 and ships with PHP 5.1.6.Regards.Marco Di Folco