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Sometimes when I alt-tab between applications, the application will just be a white screen. This has happened with terminal and with firefox. I can fix the problem and get the program to render by maximizing or minimizing it.

I am using Unity-3D and my graphics cards is a GeForce GTX 460.

Any ideas? Thanks.

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Are you using Unity? – Mechanical snail Sep 28 '12 at 4:46
Yes, I am using Unity 3D! – StuartHa Sep 28 '12 at 7:10
Okay. Then please also specify what graphics card or graphics hardware you're using, since that might be related. Note that you can edit this information into your question. – Mechanical snail Sep 28 '12 at 7:12
Am using Geforce GTX 460. – StuartHa Sep 28 '12 at 7:15
Did you installed proprietary drivers for the graphics card!?? – Alen T Sep 28 '12 at 7:22

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