diff --git a/Images/lena.tar b/Images/lena.tar
new file mode 100644
index 000000000..3afb1f542
Binary files /dev/null and b/Images/lena.tar differ
diff --git a/PIL/TarIO.py b/PIL/TarIO.py
index 73e3fc48a..37518e286 100644
--- a/PIL/TarIO.py
+++ b/PIL/TarIO.py
@@ -39,13 +39,13 @@ class TarIO(ContainerIO.ContainerIO):
                 raise IOError("unexpected end of tar file")
 
             name = s[:100].decode('utf-8')
-            i = name.find(b'\0')
+            i = name.find('\0')
             if i == 0:
                 raise IOError("cannot find subfile")
             if i > 0:
                 name = name[:i]
 
-            size = int(s[124:136], 8)
+            size = int(s[124:135], 8)
 
             if file == name:
                 break
diff --git a/Tests/test_file_tar.py b/Tests/test_file_tar.py
new file mode 100644
index 000000000..0f87ea2c0
--- /dev/null
+++ b/Tests/test_file_tar.py
@@ -0,0 +1,22 @@
+from tester import *
+
+from PIL import Image, TarIO
+
+# sample ppm stream
+tarfile = "Images/lena.tar"
+
+def test_sanity():
+    tar = TarIO.TarIO(tarfile, 'lena.png')
+    im = Image.open(tar)
+    im.load()
+    assert_equal(im.mode, "RGB")
+    assert_equal(im.size, (128, 128))
+    assert_equal(im.format, "PNG")
+
+    tar = TarIO.TarIO(tarfile, 'lena.jpg')
+    im = Image.open(tar)
+    im.load()
+    assert_equal(im.mode, "RGB")
+    assert_equal(im.size, (128, 128))
+    assert_equal(im.format, "JPEG")
+