The folowing Java code compiles.

public class J {
public static void setClass(Class<? extends java.util.List> clazz) {
System.out.println(clazz.getName());
}
}

Then, in Scala REPL, the following type error occurs:

scala> J.setClass(classOf[java.util.ArrayList[]])
:8: error: type mismatch;
found : java.lang.Classjava.util.ArrayList[_]
required: java.lang.Class[ <: java.util.List]
J.setClass(classOf[java.util.ArrayList[_]])

It seems that "Class<? extends java.util.List>" is typed as "Class[_ <: java.util.List]" instead of "Class[_ <: java.util.List[_]]".
And scalac reports the same error.

In Scala 2.8.1.final, This error doesn't occur.