Index: Core/Components/src/Core.Components.BruTile.IO/AsyncTileFetcher.cs
===================================================================
diff -u -r99f9004206bfb9de084275d749b7aeccafd6da18 -ra8cff57ee058757f8c0b4a30b181a9dc3534718e
--- Core/Components/src/Core.Components.BruTile.IO/AsyncTileFetcher.cs	(.../AsyncTileFetcher.cs)	(revision 99f9004206bfb9de084275d749b7aeccafd6da18)
+++ Core/Components/src/Core.Components.BruTile.IO/AsyncTileFetcher.cs	(.../AsyncTileFetcher.cs)	(revision a8cff57ee058757f8c0b4a30b181a9dc3534718e)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Concurrent;
+using System.IO;
 using System.Threading;
 using Amib.Threading;
 using BruTile;
@@ -93,11 +94,18 @@
         {
             ThrowExceptionIfDisposed();
 
-            byte[] res = GetTileFromCache(tileInfo);
-            if (res != null)
+            try
             {
-                return res;
+                byte[] res = GetTileFromCache(tileInfo);
+                if (res != null)
+                {
+                    return res;
+                }
             }
+            catch (IOException)
+            {
+                return null;
+            }
 
             ScheduleTileRequest(tileInfo);
             return null;
Index: Core/Components/test/Core.Components.BruTile.IO.Test/AsyncTileFetcherTest.cs
===================================================================
diff -u -r99f9004206bfb9de084275d749b7aeccafd6da18 -ra8cff57ee058757f8c0b4a30b181a9dc3534718e
--- Core/Components/test/Core.Components.BruTile.IO.Test/AsyncTileFetcherTest.cs	(.../AsyncTileFetcherTest.cs)	(revision 99f9004206bfb9de084275d749b7aeccafd6da18)
+++ Core/Components/test/Core.Components.BruTile.IO.Test/AsyncTileFetcherTest.cs	(.../AsyncTileFetcherTest.cs)	(revision a8cff57ee058757f8c0b4a30b181a9dc3534718e)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using System.IO;
 using System.Threading;
 using BruTile;
 using BruTile.Cache;
@@ -243,6 +244,41 @@
         }
 
         [Test]
+        public void GetTile_TileInPersistentCacheInUse_ReturnNull()
+        {
+            // Setup
+            var info = new TileInfo();
+            var data = new byte[0];
+
+            var mocks = new MockRepository();
+            var tileProvider = mocks.Stub<ITileProvider>();
+            tileProvider.Stub(tp => tp.GetTile(info)).Return(data);
+
+            var persistentCache = mocks.Stub<ITileCache<byte[]>>();
+            persistentCache.Stub(c => c.Find(info.Index)).Throw(new IOException());
+            mocks.ReplayAll();
+
+            using (var fetcherFiredAsyncEvent = new AutoResetEvent(false))
+            using (var fetcher = new AsyncTileFetcher(tileProvider, 100, 200, persistentCache))
+            {
+                fetcher.TileReceived += (sender, args) => { fetcherFiredAsyncEvent.Set(); };
+                fetcher.QueueEmpty += (sender, args) => { fetcherFiredAsyncEvent.Set(); };
+
+                byte[] fetchedData = fetcher.GetTile(info);
+
+                // Assert
+                Assert.IsNull(fetchedData);
+
+                if (fetcherFiredAsyncEvent.WaitOne(allowedTileFetchTime))
+                {
+                    Assert.Fail("TileFetcher should not fire asynchronous events if tile is retrieved from cache.");
+                }
+
+                mocks.VerifyAll();
+            }
+        }
+
+        [Test]
         public void GetTile_TileFetcherDisposed_ThrowObjectDisposedException()
         {
             // Setup