http://www.freewebs.com/masterpikachu/ZC%20Content/Test%20Quests/LOZ-Generation5.qst
Here, it seems like the highest leveled boomerang item's bock/reflect properties are overriding the properties of lower leveled boomerangs. For example, I tried hitting an enemy magic projectile with the wooden and magic boomerangs, and they actually reflected the magic like the fire boomerang.
NOTE: The new boomerang/hookshot rule is on.
Boomerang block/reflect override
Okay! Fixed.
Confirmed fixed in the latest windows build.