Bug Info:
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Applied background color is not showing to a toolbar when run with 1.6.0_01-b03.But i can able to see the applied background color when run with 1.6.0-b104 in GTK LookAndFeel.
But in other look and feel its working fine with both the JDK's(1.6.0-b104 and 1.6.0_01-b03).I think it regress the issue from 6U1.

JDK Info:
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java version "1.6.0_01-ea"
Java(TM) SE Runtime Environment (build 1.6.0_01-ea-b03)
Java HotSpot(TM) Client VM (build 1.6.0_01-ea-b03, mixed mode, sharing)

Steps to reproduce:
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1.Download the attached java file.
2.Run the application with 6u1 jdk.