Ok... each rune has like a unique ID or something like that... Duped runes most likely will have the same ID as the original and so... they will occasionally poof, unless you transmute or put them into a socketed item.

Also...

Quote Originally Posted by FraterPerdurabo
Who are you to judge whether people who you have never met have lives or not?
Actually, judging by the much time some of you seem to spend here, you probably have no life.

Quote Originally Posted by Bloodangel26
i answered your dumbass question
Why it's dumbass? Just because the maker is not as 1337 PMGZ as you?