I stored some valuable IOs (2 purples, 5 Luck of the Gambler procs, some other assorted IOs I didn't keep track of) in my base for later use. Today, when I went back to my base to add some new IOs, I noticed they were still on my tray in addition to the ones in the base. I don't know exactly how that happened - my best guess is that I must have done it shortly before a rollback. Just figured that if there is some replicable bug here, the devs should know about it before it wrecks the economy (and before I catch a ban for duplicating, I swear it wasn't intentional).