Comment 2 for bug 40877

looks like you set the image as the panel background. the image is lable screenshot so i assum that the top of it contains a gnome panel. now you have a screenshot of gnome panel set as the background of gnome panel.

right click on the panel and choose properties, not go to the background tab. you can set it back to "None".

this is all expected behaviour, so i will set the bug to rejected. if you feel this is bad behaviour then i suppose you should reopen it.