I had two subeautique invitations in my inventory under lock, and the pet zapper turned one of them into Dark Dust. I thought the lock was supposed to prevent that?

If you're sure both were locked (you have to lock them individually, you can't lock items as a stack) then you can file a ticket to have it looked into and your item reimbursed

Argh, that is probably what happened. Thanks for explaining it to me.

Can I edit the topic title to show it's been answered and lock my own thread? How would I do that?

You can click on the title to edit it, but you can't lock your own thread

Will do, thanks again!