diff --git a/language-adaptors/rxjava-scala/build.gradle b/language-adaptors/rxjava-scala/build.gradle
index d0d012019b..bac27a0c5b 100644
--- a/language-adaptors/rxjava-scala/build.gradle
+++ b/language-adaptors/rxjava-scala/build.gradle
@@ -21,8 +21,7 @@ sourceSets {
 }
 
 dependencies {
-	// pinning to 2.10.1 as having issues with 2.10.2
-    compile 'org.scala-lang:scala-library:2.10.1'
+	  compile 'org.scala-lang:scala-library:2.10.2'
 
     compile project(':rxjava-core')
     
diff --git a/language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/RxImplicits.scala b/language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/RxImplicits.scala
index 39bd349413..88deadb810 100644
--- a/language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/RxImplicits.scala
+++ b/language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/RxImplicits.scala
@@ -106,7 +106,7 @@ object RxImplicits {
      * type never escapes the for-comprehension
      */
     implicit class ScalaObservable[A](wrapped: Observable[A]) {
-        def map[B](f: A => B): Observable[B] = wrapped.map(f)
+        def map[B](f: A => B): Observable[B] = wrapped.map[B](f)
         def flatMap[B](f: A => Observable[B]): Observable[B] = wrapped.mapMany(f)
         def foreach(f: A => Unit): Unit = wrapped.toBlockingObservable.forEach(f)
         def withFilter(p: A => Boolean): WithFilter = new WithFilter(p)
@@ -147,7 +147,7 @@ class UnitTestSuite extends JUnitSuite {
     class ObservableWithException(s: Subscription, values: String*) extends Observable[String] {
         var t: Thread = null
         
-        override def subscribe(observer: Observer[String]): Subscription = {
+        override def subscribe(observer: Observer[_ >: String]): Subscription = {
             println("ObservableWithException subscribed to ...")
             t = new Thread(new Runnable() {
                 override def run() {
@@ -272,6 +272,18 @@ class UnitTestSuite extends JUnitSuite {
         assertSubscribeReceives(synchronized)(1, 2, 3)
     }
     
+    @Test def testZip2() {
+        val colors: Observable[String] = Observable.from("red", "green", "blue")
+        val names: Observable[String] = Observable.from("lion-o", "cheetara", "panthro")
+        
+        case class Character(color: String, name: String)
+        
+        val cheetara = Character("green", "cheetara")
+        val panthro = Character("blue", "panthro")
+        val characters = Observable.zip[Character, String, String](colors, names, Character.apply _)
+        assertSubscribeReceives(characters)(cheetara, panthro)
+    }
+    
     @Test def testZip3() {
         val numbers = Observable.from(1, 2, 3)
         val colors = Observable.from("red", "green", "blue")
@@ -283,7 +295,7 @@ class UnitTestSuite extends JUnitSuite {
         val cheetara = Character(2, "green", "cheetara")
         val panthro = Character(3, "blue", "panthro")
         
-        val characters = Observable.zip(numbers, colors, names, Character.apply _)
+        val characters = Observable.zip[Character, Int, String, String](numbers, colors, names, Character.apply _)
         assertSubscribeReceives(characters)(liono, cheetara, panthro)
     }
     
@@ -299,7 +311,7 @@ class UnitTestSuite extends JUnitSuite {
         val cheetara = Character(2, "green", "cheetara", false)
         val panthro = Character(3, "blue", "panthro", false)
         
-        val characters = Observable.zip(numbers, colors, names, isLeader, Character.apply _)
+        val characters = Observable.zip[Character, Int, String, String, Boolean](numbers, colors, names, isLeader, Character.apply _)
         assertSubscribeReceives(characters)(liono, cheetara, panthro)
     }
     
@@ -459,18 +471,9 @@ class UnitTestSuite extends JUnitSuite {
         assertSubscribeReceives(skipped)(3, 4)
     }
     
-    /**
-     * Both testTake and testTakeWhileWithIndex exposed a bug with unsubscribes not properly propagating.
-     * observable.take(2) produces onNext(first), onNext(second), and 4 onCompleteds
-     * it should produce onNext(first), onNext(second), and 1 onCompleted
-     *
-     * Switching to Observable.create(OperationTake.take(observable, 2)) works as expected
-     */
     @Test def testTake {
-        import rx.operators._
-        
         val observable = Observable.from(1, 2, 3, 4, 5)
-        val took = Observable.create(OperationTake.take(observable, 2))
+        val took = observable.take(2)
         assertSubscribeReceives(took)(1, 2)
     }
     
@@ -480,11 +483,11 @@ class UnitTestSuite extends JUnitSuite {
         assertSubscribeReceives(took)(1, 3, 5)
     }
     
-    /*@Test def testTakeWhileWithIndex {
-     val observable = Observable.from(1, 3, 5, 6, 7, 9, 11, 12, 13, 15, 17)
-     val took = observable.takeWhileWithIndex((i: Int, idx: Int) => isOdd(i) && idx > 4)
-     assertSubscribeReceives(took)(9, 11)
-     }*/
+    @Test def testTakeWhileWithIndex {
+        val observable = Observable.from(1, 3, 5, 7, 9, 11, 12, 13, 15, 17)
+        val took = observable.takeWhileWithIndex((i: Int, idx: Int) => isOdd(i) && idx < 8)
+        assertSubscribeReceives(took)(1, 3, 5, 7, 9, 11)
+    }
     
     @Test def testTakeLast {
         val observable = Observable.from(1, 2, 3, 4, 5, 6, 7, 8, 9)
diff --git a/rxjava-core/src/main/java/rx/Observable.java b/rxjava-core/src/main/java/rx/Observable.java
index fff321277b..68935749ba 100644
--- a/rxjava-core/src/main/java/rx/Observable.java
+++ b/rxjava-core/src/main/java/rx/Observable.java
@@ -1023,7 +1023,7 @@ public static <R, T0, T1, T2> Observable<R> zip(Observable<? extends T0> w0, Obs
      *            Observables, results in an item that will be emitted by the resulting Observable
      * @return an Observable that emits the zipped results
      */
-    public static <R, T0, T1, T2, T3> Observable<R> zip(Observable<T0> w0, Observable<T1> w1, Observable<T2> w2, Observable<T3> w3, Func4<? super T0, ? super T1, ? super T2, ? super T3, ? extends R> reduceFunction) {
+    public static <R, T0, T1, T2, T3> Observable<R> zip(Observable<? extends T0> w0, Observable<? extends T1> w1, Observable<? extends T2> w2, Observable<? extends T3> w3, Func4<? super T0, ? super T1, ? super T2, ? super T3, ? extends R> reduceFunction) {
         return create(OperationZip.zip(w0, w1, w2, w3, reduceFunction));
     }