javac (generic) unable to resolve methods

FULL PRODUCT VERSION :
java version "1.5.0_05"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_05-b05)
Java HotSpot(TM) Client VM (build 1.5.0_05-b05, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
javac failes to resolve the generic invocation for the methods as detailed in the code segments

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
compile the code supplied

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
code should compile and run
ACTUAL -
erro produced from javac


ERROR MESSAGES/STACK TRACES THAT OCCUR :

 <L,LF>addOrCreate4(java.lang.Number,L,LF) in NewTest<java.lang.Long,java.lang.Number> cannot be applied to (int,java.util.List<java.lang.Number>,NewTest.ListFactory<java.lang.Number>)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.*;

public class NewTest<A,B> {
    private List<A> toAdd;
    
    public NewTest(List<A> toAdd) {
        this.toAdd = toAdd;
    }
    
    private List<A> getRelated(B b) {
        //some application logic
        //for demo
        return toAdd;
    }
    
    @SuppressWarnings("unchecked")
    public <L extends List<? super A>,LF extends Factory<L>> L addOrCreate4(B b,L l,LF lf) {
        if (l == null) {
            l = lf.create();
        }
        ((List<? super A>)l).addAll(getRelated(b)); //to get round the compiler bug
        return l;
    }
    
    public static class ListFactory<T> implements Factory<List<T>>{
        public List<T> create() {
            return new ArrayList<T>();
        }
    }
    public static interface Factory<T> {
        public T create();
    }
    
    public static void main(String ... args) {
        ListFactory<Number> lf = new ListFactory<Number>();
        List<Long> longs = new ArrayList<Long>();
        longs.add(new Long(1));
        NewTest<Long,Number> test = new NewTest<Long,Number>(longs);
        
        List<Number> ret4 = null;
        
        ret4 = test.addOrCreate4(1, ret4,lf);
        
    }
}

---------- END SOURCE ----------