My mouse cursor disappears and does not come back when the mouse is moved.

Ocassionally my cursor disappears, usually when the display has gone to sleep.  The mouse is still working because I can "mouse over" places on the screen, they are highlighted, and click on items, but there is no cursor.  Fortunately, I can usually find the Apple menu and restart, but having to reboot is annoying. This did not happen before I upgraded to Lion (10.7.1).  I am usually connected to an external display when this happens.

I found this in the community.  Same problem Mouse pointer disappears on second monitor.

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