Cannot cast Comparable<?>s

The following code compiled without any problems on b48.

    public class CI {

Comparable<?> x;

void put(Comparable<?> x) { this.x = x; }

Comparable<?> get() { return x; }

void test() {
CI ci = new CI();
ci.put(new Integer(3));
Integer x = (Integer)ci.get();
}

    }

On b49 it generates the following error message:

    CI.java:15: inconvertible types
    found : java.lang.Comparable<capture of ?>
    required: java.lang.Integer
Integer x = (Integer)ci.get();
^

Unless I'm mistaken, this code is legal and should compile.

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