Bug summary:When click the show optionpane button, it display partly of the dialog and it hung until time out
Case# :api/javax_swing/interactive/JOptionPaneTests_JOptionPane 
Testsuite name:  jck
JDK/JRE tested: jdk-7u4-ea-bin-b11-macosx-amd64-09_feb_2012.tar.gz (7u4b11)
OS/architecture:  Mac mini 10.7 Memory 4GB 1067MHz DDR3
Reproducible: Always
Is it a platform specific regression: N
Is it a Regression: Not  sure
Test run log location: http://jsqalab.us.oracle.com/results/Evergreen/7u4/b11/jck/mac10.7/results/workDir/api/javax_swing/interactive/JOptionPaneTests_JOptionPane.jtr
Test run result location: http://jsqalab.us.oracle.com/results/Evergreen/7u4/b11/jck/mac10.7/results

Steps to reproduce:
1.	Install test bundle JDK7u4b11 from http://jre.us.oracle.com/java/re/jdk/7u4/promoted/ea/b11/bundles/macosx-amd64/
 to /private/var/root/Library/Java/JavaVirtualMachines/1.7.0_04.jdk-b11
2.	Download and unzip scripts JCK1.7.0.ZIP 	to /var/root/jck
3.	Download the ws JCK-runtime-7.jar  from 
http://jre.sfbay.sun.com/java/re/jck/7/promoted/fcs/b59/bundles/
 to /var/root/jck and use ??? /private/var/root/Library/Java/JavaVirtualMachines/1.7.0_04.jdk-b11/jdk1.7.0_04/1.7.0.jdk/Contents/Home/bin/java  ???jar  JCK-runtime-7.jar ??? to unzip it
4.	Modify the run.sh & jck7.jti 
5.	Make printer work fine
6.	From command line, run ???sh run.sh ??? 
7.	After java test harness launched, set the configuration step by step , and then run the cases

Descriptions:
When click the show JOptionPane Internal Message Dialog button,it display JOptionPane Internal Message Dialog and the dialog behaves correctly.

Actual behavior:
When click the show JOptionPane Internal Message Dialog button,it display partly of the dialog and it hung until time out.Refer to attachmet.The same issue with JOptionPaneTest0002,JOptionPaneTest0009,JOptionPaneTest0007,JOptionPaneTest0005,JOptionPaneTest0011.
To reproduce the issue run the atached MySmallPaneTest class and press "Show JOptionPane Internal Message Dialog" button.