MoleculeViewer demo (compiled with 1.1.1) doesn't work with appletviewer 1.0.2

To recreate the problem on solaris:
1. Compile the MoleculeViewer demo using jdk1.1.1 javac
2. Run MoleculeViewer demo using jdk1.0.2 appletviewer
   ==> Applet message: Start: applet not initialized

Exception thrown:

java.lang.NoSuchMethodError: java.awt.Dimension: method equals(Ljava/lang/Object;)Z not found
        at XYZApp.paint(XYZApp.java:379)
        at XYZApp.update(XYZApp.java:364)
        at sun.awt.motif.MComponentPeer.update(MComponentPeer.java:128)
        at sun.awt.motif.MComponentPeer.handleRepaint(MComponentPeer.java:272)
        at java.lang.Thread.run(Thread.java)