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Message: <blockquote data-quote="dadsgravy" data-source="post: 611056" data-attributes="member: 19086">If the problem does not appear while under another user, try removing your .plist files. Finder>Click the house icon on the side bar>click library>PreferencesDrag and drop this folder on to your desk top and re-start your computer. Os x will re-create this folder on re-start. This will reset all your personal settings back to their default settings. So some icons in your dock might have a question mark, your back round will be reset, etc. etc. If the ripple is no longer there, then you know it's a .plist file.If the ripple is gone, you can move the old .plist files into the new preference folder one by one and see if it comes back, or use your noodle and go through the old plist files and move back some of the important ones like, com.apple.safari.plist or firefox.plist (this will put all of your bookmarks back). I think what you're looking for as the offending plist would be any thing that was, com.apple.display.plist or screeneffect.plist or even system pref.plist.I had this same thing happen to me and after I moved the preference folder and re-started, it went away. I moved a couple of plist files back but just mainly re-set everything as I went a long over time.Anyway, good luck, and with it happening only under your user, it's a setting or a file gone wrong a little work and you'll have it fixed.</blockquote>