tested os: RHEL 5, Solaris 11
jdk version: 5u14 b03
tested languages: en, de
Menu items are invisible, when cursor is above them or, when their submenu is opened.
Screenshot is attached.

steps to reproduce:
run java -jar <JAVA_HOME>/demo/jfc/SwingSet2/SwingSet2.jar
change look and feel to GTK
browse the menu