I think some effects share a cooldown without saying it in the tooltip, but i'm not a 100% sure. If u have two effects that both give you spellpower i think that a 30 sec cd or something will pop up on the other one.
Edit: adimaya beat me to it
---------- Post added 2011-05-03 at 09:46 AM ----------
Originally Posted by Umlüx
but not in the same line?
It would look like this i think:
So basically in different lines, u can add as many as u want i believe as long as they don't have gcd.
If you have two On Use trinkets you will get a cooldown on your second trinket for the duration on your first.
But it's possible to bypass this by making a macro that fires both trinkets at the same time.
It worked in 4.0.6, haven't tried now since the trinkets i use don't have any Use effect.