Quarantine alert for Skim I'm on Mountain Lion. Every time I double-click on a pdfd (pdf bundle) document, I get the alert saying that I'm opening Skim for the first time (which is, of course, false).

I've completely disabled the quarantine system. I also tried to reset the LaunchServices database.

How can I fix this?
Solved: I had to trash Skim, rebuild the LaunchServices database, restore Skim and rebuild the database once again.