Causing a ClassCastException by trying to deserialize a Map[String, Seq[String]]

Sal.scala

package com.salattest

import com.mongodb.casbah.Imports._

import com.novus.salat._
import com.novus.salat.global._
import com.novus.salat.dao._

case class Data (
  _id: String,
  data: Map[String, Seq[String]]
)

object DataDAO extends SalatDAO[Data, String] (
  collection = MongoConnection()("salat_test")("data")
)


object Sal {
  def main(args: Array[String]): Unit = {
    val data = Data("String->List[String]", Map("a" -> Seq("ant", "all"), 
                                                "b" -> Seq("ball", "bore"), 
                                                "c" -> Seq("car", "cent")))

    DataDAO.insert(data)
    
    DataDAO.findOneByID("String->List[String]") match {
      case None => println("not found in db?")
      case Some(dat) => {

        // The keys are printed out fine
        println("KEYS")
        dat.data.keys.foreach(k => println("   " + k))
        
        // This causes a ClassCastException
        println("VALUES")
        dat.data.values.foreach(v => println("  " + v)) 
      }
    }
  }
}