These are a couple of very minor issues in the XML that may be a problem, so I thought I would flag them up.
CoreUnitStats.xml : there are 2 elements with InternalName="UnitStat_TacticalHealthRegen" (lines 707, 769).
CoreMonsterUnitTypes.xml: There are many lines with <BoolVal1></BoolVal1>. I presumed that <BoolVal1> was supposed to be a boolean value, so shouldn't it have a 0 or 1?
CoreSpells.xml : the Curgen's Volcano spell has the following line (line 3781): <TerrainStamp>valcano</TerrainStamp>. Is that a misspelling of volcano? I also don't see <TerrainStamp> anywhere else in that file, so I don't know what it does.