Java Version:
Java VM: Java HotSpot(TM) 64-Bit Server VM (1.6.0-ea-b57 mixed mode)
Platform: Solaris-sparc10
hostname: soda.sfbay

Problems:
When running SwingSet2 with -d64 flag and select GTK L&F, mustang recent build b57/b56
crashed by clicking Slider demo.
It is always reproduciable. It also repruciable in solaris-amd64.
It is OK with 32 bits java and other Look & Feel.

How to reproduce:
1. Using promoted java: /java/re/jdk/1.6.0/promoted/ea/b57/binaries/solaris-sparcv9
2. run SwingSet2 by:
   bin/java -d64 -jar demo/jfc/SwingSet2/*.jar
3. select GTK L&F
4. click Slider Demo button
5. You will see core dumped.