User blog comment:JoshuaCoalskull/Calling All Testers - MORE WEEKEND UPDATES/@comment-4468389-20111105145545/@comment-1140008-20111105175838

Note its not COMPLETELY Explosive Broadsides. That would be way too overpowered. What they do instead is have 3 or 4 of the cannonballs in a broadside fire explosive, and the rest be normal.