The new Breastplate of Destruction does not work with Ranged weapons.

Breastplate of Destruction - +5 Breastplate, Mithral, Protection +4, Destruction

http://i153.photobucket.com/albums/s...estruction.jpg

The "destruction" property on the armor work with melee but not ranged attacks. Neither bows nor xbows.

Perphaps the armor needs a fix for all weapons.