Before:
```
[success] Total time: 34 s, completed Oct 20, 2013 4:50:25 PM
> typelevel/console
[info] Compiling 2 Scala sources to /Users/jason/code/scalaz/typelevel/target/scala-2.9.2/classes...
[info] Compiling 6 Scala sources to /Users/jason/code/scalaz/typelevel/target/scala-2.9.2/classes...
[info] Starting scala interpreter...
[info]
Welcome to Scala version 2.9.2 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_37).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :javap scalaz.syntax.typelevel.HLists
Compiled from "HList.scala"
public interface scalaz.syntax.typelevel.HLists extends scala.ScalaObject{
    public abstract scalaz.typelevel.package$HCons$ $colon$colon();
}
```

After:

```
scala> :javap scalaz.syntax.typelevel.HLists
Compiled from "HList.scala"
public interface scalaz.syntax.typelevel.HLists extends scala.ScalaObject{
    public abstract void scalaz$syntax$typelevel$HLists$_setter_$$colon$colon_$eq(scalaz.typelevel.package$HCons$);
    public abstract scalaz.typelevel.package$HCons$ $colon$colon();
}
```

I sort of understand the second MiMa warning. That says: if someone extends the new `HLists`, and runs against the old one, they will get a `LinkageError` when trying to initialize the field `::`. 

The second error doesn't make sense to me, the method `scalaz.typelevel.package$HCons$ $colon$colon` is available in both versions.