diff --git a/doc/todo/enable_fsck_--fast_for_S3_remotes.mdwn b/doc/todo/enable_fsck_--fast_for_S3_remotes.mdwn
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index 0000000000..2d269e61cd
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+++ b/doc/todo/enable_fsck_--fast_for_S3_remotes.mdwn
@@ -0,0 +1,27 @@
+At the moment, ``git annex fsck --fast -f S3remote`` fails as
+
+[[!format sh """
+> git annex fsck --fast -f S3remote
+(checking cloud...) [2015-04-24 21:39:35 BST] String to sign: "HEAD\n\n\nFri, 24 Apr 2015 20:39:35 GMT\n/BUCKET/GPGHMACSHA1--6e7e880f80de44ddd845c6241198622b9102eaa1"
+[2015-04-24 21:39:35 BST] Host: "BUCKET.s3-ap-southeast-2.amazonaws.com"
+[2015-04-24 21:39:35 BST] Path: "/GPGHMACSHA1--6e7e880f80de44ddd845c6241198622b9102eaa1"
+[2015-04-24 21:39:35 BST] Query string: ""
+[2015-04-24 21:39:36 BST] Response status: Status {statusCode = 200, statusMessage = "OK"}
+[2015-04-24 21:39:36 BST] Response header 'x-amz-id-2': 'D9wtD8voZZgijJRc6i8i0QasAo85REdMMf4GpRaER5+g6sDaUYtCKi42RCdYU0kBxrx4d4dM4xM='
+[2015-04-24 21:39:36 BST] Response header 'x-amz-request-id': 'DDF95C327078E584'
+[2015-04-24 21:39:36 BST] Response header 'Date': 'Fri, 24 Apr 2015 20:39:37 GMT'
+[2015-04-24 21:39:36 BST] Response header 'Last-Modified': 'Sun, 02 Nov 2014 05:42:48 GMT'
+[2015-04-24 21:39:36 BST] Response header 'ETag': '"3bd1b766a68a305ba0495af36b353a07"'
+[2015-04-24 21:39:36 BST] Response header 'Accept-Ranges': 'bytes'
+[2015-04-24 21:39:36 BST] Response header 'Content-Type': ''
+[2015-04-24 21:39:36 BST] Response header 'Content-Length': '775647'
+[2015-04-24 21:39:36 BST] Response header 'Server': 'AmazonS3'
+[2015-04-24 21:39:36 BST] Response metadata: S3: request ID=<none>, x-amz-id-2=<none>
+
+  failed to download file from remote
+
+failed
+"""]]
+
+
+while ``git annex fsck -f S3remote`` works fine. But, to check for the presence of a file (which is my understanding of what ``--fast`` is for here), it shouldn't be necessary to download the file.