This question asks about the maiming weapon enchantment, which was updated in Complete ArcaneMagic Item Compendium:
Miniatures Handbook:
If the weapon normally has a ×2 critical multiplier, roll 1d4 each time you successfully score a critical hit to determine your multiplier. For weapons with a ×3 multiplier, roll 1d6 to determine the new multiplier. For a ×4 multiplier, roll 1d8.
Magic Item Compendium:
Whenever you score a critical hit with this weapon, it deals an amount of extra damage depending on its critical multiplier. Critical Multiplier Extra Damage:
×2 1d6
×3 2d6
×4 3d6
Was the old version broken? It seems to me that the new version is really bad, and the old version is still very weak.