do item and enhancement bonuses stack?

[Ithaquah]

Do item bonuses such as Potency stack with enhancement bonuses such as Frost Manipulation?

Likewise, what about Ice Lore and Glacial Spellcasting...?

I assumed they do, since enhancement bonuses are usually "untyped", but I wanted clarification.

Thanks!

References:
http://compendium.ddo.com/wiki/Weapo..._the_Ogre_Magi

http://compendium.ddo.com/wiki/Enhan...nipulation_III


http://compendium.ddo.com/wiki/Armor:Frostflame_Robe

http://compendium.ddo.com/wiki/Enhan...ellcasting_III

[Milfeulle]

Your character enhancement bonus will always stack with your item bonus.

[Matuse]

All enhancements stack with all items stack with all feats.

Exception: Improved Critical does not stack with Keen/Impact.