AmazingAmpharos
Forest Temple generated two major items with "Dungeons Have One Major Item" flag on
First, please excuse me for the seed name. Just getting that out of the way. It's in the spoiler log. The one item per dungeon flag was on, yet I found two major items inside the Forest Temple. The first was a Silver Scale located inside the well chest. After spending several hours flipping the rest of the game upside down in search of the Light Arrows, I finally stumbled upon them a little deeper in the Forest Temple while going after it's medallion. According to the FAQ, swimming scales and all C-button items should be considered major items. Finding the Silver Scale here means I shouldn't have been able to find Light Arrows inside the Forest Temple as well. OoT_5856KRSPP6AYAKAJWB_DICKBUTT_Spoiler.txt
Was Silver Scale required to beat the game in logic? If that is not the case, maybe the algorithm considered the scale to be a minor item. Just a guess though.
Silver Scale wasn't essential, but the description of the rule defines a list of major items. It shouldn't care if they are on the way of the hero or not.