Bug? Blank windows appear when I close a document; they cannot be closed

Discussion in 'OS X Mountain Lion (10.8)' started by jason.siegel, Jan 4, 2013.

  1. macrumors 6502

    Jun 15, 2011
    Is this some sort of Mountain Lion bug? Suddenly, occasionally, when I close a Preview window, another window of the same dimensions—but blank—manifests underneath the closed one. I cannot close it, and have to force quit the application.

    A similar problem happened yesterday with Mail; there was an all-black window (with no title bar or anything).

    Why is this happening?

    Attached Files:

  2. macrumors 6502

    Jul 14, 2008
    Arizona, USA
    I do not know why this happens but I'm wondering whether you restarted your Mac in-between and whether the same things are still happening then.
  3. thread starter macrumors 6502

    Jun 15, 2011

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