I am seeing a issue with the jasper report "Average and Peak Traffic rates for Nodes by Interface" / "this month" / "last month" where the report will only generate data if the interface is one that I have defined in the provisioning groups. The reports do not show data for the interfaces that are discovered on a particular node. In the report I see "No Data for this Interface". An example: I have a router with a management interface that is added to a provisioning group and after syncing all the layer 3 or SVI interfaces are then discovered, only the management interface reports back data but do start to collect via the data collection configuration and can be viewed via the KCS reports.
I have confirmed this behavior on a test server running the same version as well as the demo.opennms.org box.