As a potential user, I want to understand OpenOpt's core capabilities and recent activity. Identify three distinct types of optimization problems listed on the 'Problems Tree' page. Additionally, find the most recent confirmed software release date from the 'Changelog' and determine the last year of any recorded activity within the forum.
Navigate to the 'Problems Tree' page. Identify and list at least three distinct optimization problem types. Navigate to the 'Changelog' page. Identify and state the most recent confirmed software release date. Navigate to the 'Forum' page. Identify and state the last year of recorded activity in the forum by checking the 'last post' dates.
Successfully identify and list at least three distinct problem types from the 'Problems Tree' (e.g., LP, QP, MILP, SLE, etc.). State the most recent confirmed software release date as '2012-March-15' (or 0.38 from 2012-03-15). State the last year of recorded activity in the forum as '2012'.