The documentation of Zabbix 2.0 says: "If a problem happens during the maintenance and is not resolved, a notification is generated after the maintenance period ends."
We have exactly this situation but Zabbix is not sending a notification message after the maintenance period ends although the problem still exists.
But when the Trigger changes to OK, a notification message has been sent. That's not what we want and is wrong.

Tested with default Action settings and checked Recovery message.
Maintenance is with data collection.

Tested triggers with simple functions (last) and time related (nodata). Complex triggers are tested as well.