diff --git a/apps/cuteness.io/reddit-app-view-model.ts b/apps/cuteness.io/reddit-app-view-model.ts
index 1f79e87c7..54e8edf61 100644
--- a/apps/cuteness.io/reddit-app-view-model.ts
+++ b/apps/cuteness.io/reddit-app-view-model.ts
@@ -17,7 +17,6 @@ var ISSCROLLING = "isLoading";
 
 // initialize the image cache for the main list
 export var cache = new imageCache.Cache();
-cache.invalid = defaultNoThumbnailImageSource;
 cache.placeholder = defaultThumbnailImageSource;
 cache.maxRequests = 5;
 
diff --git a/apps/tests/ui/image-cache/image-cache-tests.ts b/apps/tests/ui/image-cache/image-cache-tests.ts
index e918ceff9..5b937accd 100644
--- a/apps/tests/ui/image-cache/image-cache-tests.ts
+++ b/apps/tests/ui/image-cache/image-cache-tests.ts
@@ -13,7 +13,6 @@ export function test_DummyTestForSnippetOnly() {
     // ### Requesting Images
     // ``` JavaScript
     var cache = new imageCacheModule.Cache();
-    cache.invalid = imageSource.fromFile(fs.path.join(__dirname, "res/reddit-logo.png"));
     cache.placeholder = imageSource.fromFile(fs.path.join(__dirname, "res/no-image.png"));
     cache.maxRequests = 5;
     
diff --git a/ui/image-cache/image-cache-common.ts b/ui/image-cache/image-cache-common.ts
index c3315a67f..8c243a137 100644
--- a/ui/image-cache/image-cache-common.ts
+++ b/ui/image-cache/image-cache-common.ts
@@ -2,11 +2,6 @@
 import observable = require("data/observable");
 import imageSource = require("image-source");
 
-// TODO: What is valid image?
-function isValidImage(url: string): boolean {
-    return url.indexOf(".png") !== -1 || url.indexOf(".jpg") !== -1;
-}
-
 export module knownEvents {
     export var downloaded = "downloaded";
 }
@@ -18,7 +13,6 @@ export interface DownloadRequest {
 }
 
 export class Cache extends observable.Observable implements definition.Cache {
-    public invalid: imageSource.ImageSource;
     public placeholder: imageSource.ImageSource;
     public maxRequests = 5;
     private _enabled = true;
@@ -166,11 +160,6 @@ export class Cache extends observable.Observable implements definition.Cache {
             return false;
         }
 
-        if (!isValidImage(request.url)) {
-            this._cache[request.key] = this.invalid;
-            return false;
-        }
-
         if (this._currentDownloads >= this.maxRequests || !this._enabled) {
             if (onTop) {
                 this._queue.push(request);
diff --git a/ui/image-cache/image-cache.d.ts b/ui/image-cache/image-cache.d.ts
index 55c149be9..ce69ca354 100644
--- a/ui/image-cache/image-cache.d.ts
+++ b/ui/image-cache/image-cache.d.ts
@@ -27,10 +27,6 @@ declare module "ui/image-cache" {
      * Represents a class that stores handles image download requests and caches the already downloaded images.
      */
     export class Cache extends observable.Observable {
-        /**
-         * The image to be used when the requested url is invalid or the result may not be decoded.
-         */
-        invalid: imageSource.ImageSource;
         /**
          * The image to be used to notify for a pending download request - e.g. loading indicator.
          */