Mountain lion second monitor no background

In Lion, the second monitor of my dual monitor system periodically lost the background and went gray.  Now instead of fixing it, it got worse in Mountain Lion.  I kill the dock process and it fixes it but it happens all the time now.  Has anyone found a permanent fix for this?

I am having the same problem, however mine just started. I have had Mountain Lion since it came out, but this is the first time I have seen this problem. My cinema display shows a desktop background fine, but my macbook pro will not set a desktop background. It is just grey...

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    Hello Carlo!
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    when do i reach critical limits?
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  • Mountain Lion Freezes 30 Seconds Every Hour

    I've recently migrated from a Mac Pro running Lion to a MacBook Pro running Mountain Lion. I migrated using a Time Machine backup and to make a long story short, it was an ordeal, but I've got everything running smoothly now… Everything except for one thing.
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    please help me!!!! my macbook pro 15 running on mountain lion is hanging a lot...sometimes when i use any app than it get freeze for some seconds...what should i do?

    Hardware Information:
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                        Recovery HD (disk0s3) <not mounted>: 650 MB
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                     [failed] com.apple.AirPlayUIAgent.plist
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                     [loaded] com.adobe.SwitchBoard.plist
                     [loaded] com.google.keystone.daemon.plist
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                     [loaded] com.google.keystone.agent.plist
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                     [loaded] com.facebook.videochat.Akshay.plist
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              BitTorrent
              uTorrent
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              AdobePDFViewerNPAPI.plugin
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              6.9   %          coreaudiod
              6.4   %          uTorrent
              1.9   %          WebProcess
              1.4   %          iTunes
              1.2   %          EtreCheck
              0.5   %          fontd
              0.2   %          NotificationCenter
              0.1   %          Dock
              0.0   %          Microsoft

  • Numbers does not open with the main user after installing mountain lion. It works flawlessly when I use the second account on my mac. What got corrupted in the admin-account, something in the user-library? How can I fix it? I´m kinda desperate...

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