Please see the following mini test (JCK tests use the similar code pattern):
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import java.util.EnumMap;

enum Suit {
    CLUBS, DIAMONDS;
}

public class minitest {
    static Object [] array = {
        Suit.CLUBS, "value1",
        Suit.DIAMONDS, "value2"
    };

    public static void main(String[] args) {
        EnumMap map = new EnumMap(Suit.class);
        map.put(array[0], array[1]);
    }
}
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It compiles on JDK b54, and fails on b55 with the output:
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minitest.java:15: cannot find symbol
        map.put(array[0], array[1]);
           ^
  symbol: method put(java.lang.Object,java.lang.Object)
  location: class java.util.EnumMap
---------------------------------------------------------

Could you please clarify is this behavior correct ?