Snv 83, vermillion 84(GNOME 2.21.90) sparc and x86, java version "1.6.0_04"

Steps:

1. Launch SwingSet2 demo java -jar SwingSet2.jar
2. Change to GTK L&F
3. Click the JComboBox demo

Actual result:
SwingSet2 demo crashes, with gtk-critical warnings:
bash-3.2$ java -jar SwingSet2.jar 

(<unknown>:885): Gtk-WARNING **: Attempting to add a widget with type GtkButton to a GtkComboBoxEntry (need an instance of GtkEntry or of a subclass)

Gtk-CRITICAL **: file gtkwidget.c: line 3239: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed
aborting...
Trace/Breakpoint Trap

Expected result:
No crash