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Bug
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    Resolution: Cannot Reproduce
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  Not Evaluated                     
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    None
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    4.6.2
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    None
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    Mac OS X 10.5.8, Qt/Cocoa 4.6
 
On Mac OS X 10.5.8, Qt/Cocoa 4.62, separators within a QComboBox are drawn with an incorrect background.
The attached app demonstrates the problem, and has a screenshot comparing a QComboBox to a native NSPopUpButton.
The incorrect background seems to be caused by QMacStyle::drawControl, which draws a CE_MenuItem using the kThemeMenuItemPopUpBackground bit.
If the kThemeMenuItemPopUpBackground bit is not set, the separator matches the appearance of a NSPopUpButton.