To represent this bug run Setup of java.lang use java 1.5.0
Run SignatureTest in binary mode, you will see following picture:

Added Methods
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java.lang.Boolean: method abstract public final int compareTo(java.lang.Object)
java.lang.Byte: method abstract public final int compareTo(java.lang.Object)
java.lang.Enum: method abstract public int compareTo(java.lang.Object)
java.lang.Float: method abstract public final int compareTo(java.lang.Object)
java.lang.Long: method abstract public final int compareTo(java.lang.Object)
java.lang.Short: method abstract public final int compareTo(java.lang.Object)
java.lang.String: method abstract public final int compareTo(java.lang.Object)


STATUS:Failed.7 errors

If you run SignatureTest in src mode or if you use java 1.4.2 test would be OK