1e
Besides causing damage to creatures, the fireball ignites all combustible materials within its burst radius, and the heat of the fireball will melt soft metals such as gold, copper, silver, etc. Items exposed to the spell's effects must be rolled for to determine if they are affected. Items with a creature which makes its saving throw are considered unaffected.
2e
Besides causing damage to creatures, the fireball ignites all combustible materials within its burst radius, and the heat of the fireball melts soft metals such as gold, copper, silver, etc. Exposed items require saving throws vs. magical fire to determine if they are affected, but items in possession of a creature that rolls a successful saving throw are unaffected by the fireball.
"must" vs. "require" looks the same to me