OS X 10.9.3 has two visible cursors Basicaly my problem is, that when i mouse over some text, the default "text-selection" cursor appears. But the mouse pointer (arrow) is still present and i can see two cursors.

What could be causing this? It seems to happen when i "lock" my mac with the login window and then logging in.

Help?

I'm using OSX 10.9.3 on a late 2013 13" macbook pro with retina display and two atached monitors (one on a thunderbolt->DVI connection and another connected via the HDMI out)
It just happened to me on 10.9.5 for the first time; don't know what caused it but unplugging the external monitor and then plugging it back again helped.