evince: weird icon, causes screen to freeze

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http://ubuntuforums.org – Sometimes, when using evince to display a PDF flle, an unknown icon is displayed. It looks like a page of text, with a hand and a "plus sign" (+) in the upper left corner. Picture attached. Activity that seems to cause this is left-clicking the mouse and then dragging. (Although it doesn't seem to happen consistently.) When this icon is visible, the computer freezes up for a number of seconds. If I happen to notice the icon before releasing the mouse button, I can drag it back into the document area and then release the button. Otherwise, I need to wait until the program fi (Hardware)