When generating reports from VA, the event-type icons are displayed only as empty circles in the summary table even when the event has a trigger attached (message, rule etc.). I think it would be useful if the trigger symbol would be displayed inside the circle - thus providing full information about that particular event.
VP Suite 3.1 Service Pack 1 has been released with the support of showing icons with the event type. If you are running VP Suite 3.1, you can advance to Service Pack 1 by running the Updater inside the bin folder of VP Suite installation directory.
Hope this helps. As always, feel free to let me know if there are any questions.