Obryn
Hero
Whoa, take it easy there...There is no such limitation! Your one scrap of claimed "evidence" was both A) unrelated and B) wrong anyway!
When you want to use a daily item power, there are two limitations.
1. You must have at least one daily item power "slot" left.
2. The specific item daily power must not have been used yet that day.
You want to introduce a third limitation, for which there is no textual, logical, or fluff support whatsoever:
3. You specifically must not have used that specific item daily power that day.
This argument is silly.
For what it's worth, I can see what he's talking about under the "Daily" rules in the magic item section. It says more or less that a character can't use the same Daily item twice in a day. This could be interpreted as separate from the rule that a Daily item can only work once per day.
I would have a very hard time believing it's RAI, but I can see where a strict reading of the rules would lead someone to his reading.
(Personally, I think it's a clarification rather than a rule, to emphasize that the rule about X daily item uses per day doesn't allow you to use a single daily item multiple times under normal circumstances.)
-O