Description: Mustang does not display default Solaris10 GTK L&F a.k.a. Blueprint on AMD64 platform. When an application using GTK L&F is run, following message is repeatedly dumped to console:
(<unknown>:4334): Gtk-WARNING **: Unable to locate theme engine in module_path: "blueprint",
default GTK L&F is displayed afterwards.

Regression: YES, works fine with Tiger and Mustang 32-bit

java version:
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b93)
Java HotSpot(TM) 64-Bit Server VM (build 1.6.0-rc-b93, mixed mode)

bundles tested:
jdk-6-rc-bin-b93-solaris-amd64-27_jul_2006.sh
jdk-6-rc-bin-b93-solaris-i586-27_jul_2006.sh

Steps to reproduce:
1) Run SwingSet demo application
2) Switch to the GTK L&F
3) Check the warning message in the console and wrongly displayed L&F

Locale: C, de_DE.UTF-8