OSX dock mysterious element I have a mysterious element appearing on my dock that looks like the indicator under a folder but isn't actually attached to anything - any ideas how to get rid of this?



If I turn on dock hiding it disappears when the dock is hidden but reappears when the dock is visible.

Hardware: Macbook Pro Retina 13 running OS X Yosemite 10.10.1
I managed to fix this by restarting the dock by running the following in the terminal:

killall -KILL Dock