This is happening to me too. It just started about a week ago. I have four icons in my notification area immediately after I log in; wireless, battery/power, bluetooth and volume control. Sometimes of of the icons will have a non-operational double that takes the place of one of the other icons (but I only ever have a total of four icons) and other times, one of the icons will be covered by some other image that looks like a chunk of the right part of the panel. I can fix the issue by removing the notification area from my top panel and adding it back.
This is happening to me too. It just started about a week ago. I have four icons in my notification area immediately after I log in; wireless, battery/power, bluetooth and volume control. Sometimes of of the icons will have a non-operational double that takes the place of one of the other icons (but I only ever have a total of four icons) and other times, one of the icons will be covered by some other image that looks like a chunk of the right part of the panel. I can fix the issue by removing the notification area from my top panel and adding it back.