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Why is UIGroupTableViewBackgroundColor causing Xcode 4.2 to choke?



I'm using Xcode 4.2 on Mac OS X Lion 10.7.3 and for some reason, every time I set UIGroupTableViewBackgroundColor as the background color on my UIView, the compiler refuses to build my app.





When I open the "newly corrupted" XIB as XML and remove the offending XML represenation of the background color, the app compiles. I am able to apply the background color in code, but doing so in Interface Builder fails miserably.





Here's the code that chokes Xcode. Any clue why this is happening?







<object class="NSColor" key="IBUIBackgroundColor">

<int key="NSColorSpace">10</int>

<object class="NSImage" key="NSImage">

<int key="NSImageFlags">549453824</int>

<string key="NSSize">{512, 1}</string>

<array class="NSMutableArray" key="NSReps">

<array>

<integer value="0"/>

<object class="NSBitmapImageRep">

<object class="NSData" key="NSTIFFRepresentation">

<bytes key="NS.bytes">TU0AKgAACAjFzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj



/

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xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/

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xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/

xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/

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xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/

xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/

xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/

xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/

y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/

y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/

xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/

xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/

xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/

xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/

xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/

y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/

y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/

xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/

xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/

xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/

xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/

xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/

y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/

y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/

xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/

xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/

xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/xczS/8vS2P/L0tj/xczU/8XM1P/FzNT/

xczU/8XM0v/L0tj/y9LY/8XM1P/FzNT/xczU/8XM1P/FzNL/y9LY/8vS2P/FzNT/xczU/8XM1P/FzNT/

xczS/8vS2P/L0tj/xczU/wANAQAAAwAAAAECAAAAAQEAAwAAAAEAAQAAAQIAAwAAAAQAAAiqAQMAAwAA

AAEAAQAAAQYAAwAAAAEAAgAAAREABAAAAAEAAAAIARIAAwAAAAEAAQAAARUAAwAAAAEABAAAARYAAwAA

AAEAAQAAARcABAAAAAEAAAgAARwAAwAAAAEAAQAAAVIAAwAAAAEAAQAAAVMAAwAAAAQAAAiyAAAAAAAI

AAgACAAIAAEAAQABAAE</bytes>

</object>

</object>

</array>

</array>

<object class="NSColor" key="NSColor">

<int key="NSColorSpace">3</int>

<bytes key="NSWhite">MCAwAA</bytes>

</object>

</object>

<string key="IBUIColorCocoaTouchKeyPath">groupTableViewBackgroundColor</string>

</object>







Here's what it looks like in Xcode:





enter image description here





Any clue what could be causing the problem?


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