I use Keepass 1.x on windows and KeepassX on the mac to access the same database stored in dropbox. I noticed that when I copy a password using CTRL+C, that password stays in memory even after I close the Keepass database. I looked in the options have the feature checked to "copy data to clipboard and clear it automatically after some seconds"...and I am using 10 seconds as the time limit, but it doesn't clear the clipboard. Can someone tell me what I'm doing wrong? I've been using Keepass for years and never noticed this security flaw (on my side). How can I fix it so that my passwords don't stay in memory so that I can't paste them using CTRL+V long after I closed my password database?