Memorization bug reports

There have been a few of these lately about problems memorizing specific spells so I figured I'd lay out the rules.
1) Avatar spells can not be memorized.
2) Currently there are only mage stones in the game so only mage spells can be memorized. A mage spell is a spell where the mage level to learn is <= all other classes level to learn.
So from the bug reports:
Lloyds Beacon = Cleric Spell
Improved Haste = Avatar Spell
You can memorize spells like "spirit watcher" where multiple classes receive the spell at the same level as mage.
1) Avatar spells can not be memorized.
2) Currently there are only mage stones in the game so only mage spells can be memorized. A mage spell is a spell where the mage level to learn is <= all other classes level to learn.
So from the bug reports:
Lloyds Beacon = Cleric Spell
Improved Haste = Avatar Spell
You can memorize spells like "spirit watcher" where multiple classes receive the spell at the same level as mage.