1) When in the Crypt and you kill off the spirits of the warrior and wizard...you get 2 crystals....they are unidentified, so I tried one on the warrior side and grabbed the idol..I went to the other side and the crystal didn't work...after an ID, it showed I had a Warrior Crystal in hand....the bug is: The Wizard's Crystal fits in both slots, but the Warrior's only fits it's own...
2) Strength requirements don't appear to work on weapons...My priest had a STR of 8 and was able to equip and use 2 different maces (min STR 10 and 14)...
3) While walking around the water area above the Toad Village, the mini-map blanks out and shows a different area...This appears near the dock where the ladder to the village is.

1) Your only supposed to be able to use one of the crystals, because you only go down one path. Though you can build a stack of crates/barrels and take both paths
2) str requirement on weapons if your read the manual only determines ones ability to use the weapon. Meaning you can use a weapon you don't have enough strength for but you will miss more and won't do as much damage.
3) Yes there are a couple mini map bugs =)