Hi, I'm developing under Mac OS X Sweet Home 3D, a Java application that requires Java 3D. It runs fine with Java 3D 1.3.1 under Windows XP SP2 with Parallels Desktop, but it won't run with Java 1.5.1 and Java 6u2. In fact, any Java 3D 1.5.1 won't run. You can test this problem with Java 3D demos available at http://java3d.dev.java.net/. My computer is a MacBook Core Duo 2 GHz with Mac OS X 10.4.10 and I tested it with Parallels Desktop v1 and v3 beta.