URI validation, introduced in Zabbix 3.0.11, now can be turned off/on in the new VALIDATE_URI_SCHEMES frontend constant.
vmware.eventlogitems that previously were always taking only the 10 latest events will now browse up to 1000 (this is a VMware limitation) events in search of events that have not yet been processed. This means there is less chance to miss events when they are generated at a higher rate. Zabbix can also catch up after some downtime.
From now on, Zabbix internal item zabbix[java,,ping] will not become not supported if java gateway is misconfigured or java gateway is unreachable.