lift-json 2.4M1 incorrectly parsing option classes?

lift-json 2.4M1 incorrectly parsing option classes?

import org.junit.{Test, Assert}
import org.junit.Assert._

import net.liftweb.json._
import net.liftweb.json.Serialization.write

case class Library(name:String, docs:List[Option[String]])
class AppTest{
  @Test
  def testMain{
    implicit val formats = Serialization.formats(NoTypeHints)
    val content = """
    {"name":"test", "docs": ["1", "2"]}
    """
    val lib = parse(content).extract[Library]
    println(lib)

    assertEquals(List(Some("1"), Some("2")), lib.docs)
  }
}