diff --git a/Rx.playground/Pages/Introduction.xcplaygroundpage/Contents.swift b/Rx.playground/Pages/Introduction.xcplaygroundpage/Contents.swift
index 58855807..49e5d685 100644
--- a/Rx.playground/Pages/Introduction.xcplaygroundpage/Contents.swift
+++ b/Rx.playground/Pages/Introduction.xcplaygroundpage/Contents.swift
@@ -46,7 +46,7 @@ All of these various systems makes our code needlessly complex. Wouldn't it be b
 
  `--tap--tap----------tap--> // "|" = Continues indefinitely, such as a sequence of button taps`
 
- > These diagrams are call marble diagrams. You can learn more about them at [RxMarbles.com](http://rxmarbles.com).
+ > These diagrams are called marble diagrams. You can learn more about them at [RxMarbles.com](http://rxmarbles.com).
 */
 /*:
  ### Observables and observers (aka subscribers)
diff --git a/Rx.xcodeproj/project.pbxproj b/Rx.xcodeproj/project.pbxproj
index bf8733d7..9ae9ce93 100644
--- a/Rx.xcodeproj/project.pbxproj
+++ b/Rx.xcodeproj/project.pbxproj
@@ -1727,6 +1727,7 @@
 		C8C4B4C01C17727000828BD5 /* MessageSentObserver.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MessageSentObserver.swift; sourceTree = "<group>"; };
 		C8D132431C42D15E00B59FFF /* SectionedViewDataSourceType.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SectionedViewDataSourceType.swift; sourceTree = "<group>"; };
 		C8D132521C42DA7F00B59FFF /* SectionedViewDataSourceMock.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SectionedViewDataSourceMock.swift; sourceTree = "<group>"; };
+		C8D2C1501D4F3CD6006E2431 /* Rx.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = Rx.playground; sourceTree = "<group>"; };
 		C8DB967D1BF7496C0084BD53 /* KVORepresentable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = KVORepresentable.swift; sourceTree = "<group>"; };
 		C8DB96821BF754C80084BD53 /* NSObject+Rx+KVORepresentable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "NSObject+Rx+KVORepresentable.swift"; sourceTree = "<group>"; };
 		C8DB96871BF756F40084BD53 /* KVORepresentable+CoreGraphics.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "KVORepresentable+CoreGraphics.swift"; sourceTree = "<group>"; };
@@ -2529,6 +2530,7 @@
 		C8A56ACD1AD7424700B4673B = {
 			isa = PBXGroup;
 			children = (
+				C8D2C1501D4F3CD6006E2431 /* Rx.playground */,
 				C8093C471B8A72BE0088E94D /* RxSwift */,
 				C8093F571B8A73A20088E94D /* RxBlocking */,
 				C8093E801B8A732E0088E94D /* RxCocoa */,
diff --git a/RxCocoa/iOS/UITableView+Rx.swift b/RxCocoa/iOS/UITableView+Rx.swift
index ea9a1605..4996d5b9 100644
--- a/RxCocoa/iOS/UITableView+Rx.swift
+++ b/RxCocoa/iOS/UITableView+Rx.swift
@@ -283,7 +283,7 @@ extension UITableView {
     Reactive wrapper for `delegate` message `tableView:willDisplayCell:forRowAtIndexPath:`.
     */
     public var rx_willDisplayCell: ControlEvent<WillDisplayCellEvent> {
-        let source: Observable<DidEndDisplayingCellEvent> = rx_delegate.observe(#selector(UITableViewDelegate.tableView(_:willDisplay:forRowAt:)))
+        let source: Observable<WillDisplayCellEvent> = rx_delegate.observe(#selector(UITableViewDelegate.tableView(_:willDisplay:forRowAt:)))
             .map { a in
                 return (try castOrThrow(UITableViewCell.self, a[1]), try castOrThrow(IndexPath.self, a[2]))
             }
diff --git a/RxSwift/Observables/Implementations/Filter.swift b/RxSwift/Observables/Implementations/Filter.swift
index e84d952a..50cfcdae 100644
--- a/RxSwift/Observables/Implementations/Filter.swift
+++ b/RxSwift/Observables/Implementations/Filter.swift
@@ -12,8 +12,6 @@ class FilterSink<O : ObserverType>: Sink<O>, ObserverType {
     typealias Predicate = (Element) throws -> Bool
     typealias Element = O.E
     
-    typealias Parent = Filter<Element>
-    
     private let _predicate: Predicate
     
     init(predicate: Predicate, observer: O) {