### Please describe the problem.
I am trying to set out two computers on the same network to synchronise.

### What steps will reproduce the problem?
Install Git-Annex. Start the webapp. Try to connect. Enter a secret phrase on both. The Mythbuntu machine shows "Failed to sync with Inspiron 14z" (the laptop). The laptop shows "Pairing in progress" forever.

The machines can normally connect together passwordlessly through ssh with public key encryption. 

### What version of git-annex are you using? On what operating system?
Ubuntu Raring Version: 3.20121112ubuntu2 from the repos on my laptop.  Install version 4.20130627 from the PPA on Mythbuntu Precise (which I use as a home server).

### Please provide any additional information below.
From the the laptop, where I started the pairing:
[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log
$ git-annex webapp 

(process:3084): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed

** (firefox:3084): WARNING **: Failed to find domain member of JSON manifest
Running global cleanup code from study base classes.
(Recording state in git...)

Launching web browser on file:///tmp/webapp3075.html
(scanning...) 
  dbus failed; falling back to mtab polling (ClientError {clientErrorMessage = "Call failed: The name org.gtk.Private.GduVolumeMonitor was not provided by any .service files", clientErrorFatal = False})
(started...) Generating public/private rsa key pair.
Your identification has been saved in /tmp/git-annex-keygen3075.0/key.
Your public key has been saved in /tmp/git-annex-keygen3075.0/key.pub.
The key fingerprint is:
79:00:67:a4:f0:5f:62:26:78:ed:09:97:e4:c4:dd:56 aaron@Inspiron-14z
The key's randomart image is:
+--[ RSA 2048]----+
|    . .o*. . .E  |
|     + X... o    |
|    . * X ..     |
|     . O *       |
|        S .      |
|         .       |
|                 |
|                 |
|                 |
+-----------------+
Control socket connect(/home/shared/annex/.git/annex/ssh/mythbuntu@git-annex-mythbuntu-server.local-mythbuntu): Connection refused
Failed to connect to new control master
warning: no common commits

  Remote mythbuntuserver.local_annex does not have git-annex installed; setting remote.mythbuntuserver.local_annex.annex-ignore
Already up-to-date.
Counting objects: 13, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (9/9), done.
Writing objects: 100% (11/11), 1.06 KiB, done.
Total 11 (delta 2), reused 0 (delta 0)
To ssh://mythbuntu@git-annex-mythbuntu-server.local-mythbuntu/~/annex/
 * [new branch]      git-annex -> synced/git-annex
 * [new branch]      master -> synced/master
Already up-to-date!
Merge made by the 'recursive' strategy.
Already up-to-date.
Already up-to-date.
Counting objects: 2, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (2/2), 326 bytes, done.
Total 2 (delta 1), reused 0 (delta 0)
To ssh://mythbuntu@git-annex-mythbuntu-server.local-mythbuntu/~/annex/
   82bf946..dfe0bd1  master -> synced/master
Already up-to-date.
SendMessage (77594660, 0x101f, (nil), (nil))
SendMessage (0, 0x1203, (nil), 0x7fffc68a1850)
SendMessage (0, 0x1204, (nil), 0x7fffc68a1850)
SendMessage (0, 0x1203, 0x1, 0x7fffc68a1850)
SendMessage (0, 0x1204, 0x1, 0x7fffc68a1850)
SendMessage (0, 0x1203, 0x2, 0x7fffc68a1850)
SendMessage (0, 0x1204, 0x2, 0x7fffc68a1850)
SendMessage (0, 0x1203, 0x3, 0x7fffc68a1850)
SendMessage (0, 0x1204, 0x3, 0x7fffc68a1850)
SendMessage (0, 0x1203, 0x4, 0x7fffc68a1850)
SendMessage (0, 0x1204, 0x4, 0x7fffc68a1850)
SendMessage (77594660, 0x101f, (nil), (nil))
SendMessage (0, 0x1203, (nil), 0x7fffc68a1810)
SendMessage (0, 0x1204, (nil), 0x7fffc68a1810)
SendMessage (0, 0x1203, 0x1, 0x7fffc68a1810)
SendMessage (0, 0x1204, 0x1, 0x7fffc68a1810)
SendMessage (0, 0x1203, 0x2, 0x7fffc68a1810)
SendMessage (0, 0x1204, 0x2, 0x7fffc68a1810)
SendMessage (0, 0x1203, 0x3, 0x7fffc68a1810)
SendMessage (0, 0x1204, 0x3, 0x7fffc68a1810)
SendMessage (0, 0x1203, 0x4, 0x7fffc68a1810)
SendMessage (0, 0x1204, 0x4, 0x7fffc68a1810)
SendMessage (77594660, 0x101f, (nil), (nil))
SendMessage (0, 0x1203, (nil), 0x7fffc68a2920)
SendMessage (0, 0x1204, (nil), 0x7fffc68a2920)
SendMessage (0, 0x1203, 0x1, 0x7fffc68a2920)
SendMessage (0, 0x1204, 0x1, 0x7fffc68a2920)
SendMessage (0, 0x1203, 0x2, 0x7fffc68a2920)
SendMessage (0, 0x1204, 0x2, 0x7fffc68a2920)
SendMessage (0, 0x1203, 0x3, 0x7fffc68a2920)
SendMessage (0, 0x1204, 0x3, 0x7fffc68a2920)
SendMessage (0, 0x1203, 0x4, 0x7fffc68a2920)
SendMessage (0, 0x1204, 0x4, 0x7fffc68a2920)
Redirection loop trying to set HTTPS on:
  http://www.aol.com/favicon.ico
(falling back to HTTP)
SendMessage (77594652, 0x444, 0x1, 0x3652e00)
SendMessage (77594652, 0x444, 0x1, 0x3647de0)
SendMessage (77594652, 0x444, 0x1, 0x3667a80)
SendMessage (77594652, 0x444, 0x1, 0x3667a80)

# End of transcript or log.
# End of transcript or log.
"""]]

On the Mythbuntu machine:
[[!format sh """
$ git-annex webapp
Launching web browser on file:///tmp/webapp8399.html
(Recording state in git...)
"""]]

Unless I'm going mad, there doesn't seem to be a daemon.log on my laptop.

Daemon.log on the Mythbuntu machine:
[[!format sh """
[2013-07-14 10:38:56 BST] main: starting assistant version 4.20130627
(scanning...) [2013-07-14 10:38:56 BST] Watcher: Performing startup scan
(started...) [2013-07-14 10:38:57 BST] PairListener: aaron@Inspiron-14z:/home/shared/annex is sending a pair request.
Generating public/private rsa key pair.
Your identification has been saved in /tmp/git-annex-keygen.0/key.
Your public key has been saved in /tmp/git-annex-keygen.0/key.pub.
The key fingerprint is:
bb:8c:66:05:22:8e:fa:e1:10:33:6d:cb:d6:57:e2:47 mythbuntu@mythbuntu-server
The key's randomart image is:
+--[ RSA 2048]----+
|                 |
|                 |
|                 |
| .. . .          |
|+oo. ...E        |
|.*.o . +..       |
|o = . o.o        |
|.+ . .o+ .       |
| .o  o. o        |
+-----------------+
[2013-07-14 10:39:13 BST] main: Pairing with aaron@Inspiron-14z:/home/shared/annex in progress
ssh: connect to host Inspiron-14z.local port 22: Connection refused
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
[2013-07-14 10:39:17 BST] PairListener: Syncing with Inspiron14z.local__home_shared_annex 
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
Already up-to-date.
Already up-to-date.
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
Updating 82bf946..dfe0bd1
Fast-forward
[2013-07-14 10:39:56 BST] Pusher: Syncing with Inspiron14z.local__home_shared_annex 
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
ssh: connect to host Inspiron-14z.local port 22: Connection refused
fatal: The remote end hung up unexpectedly
"""]]
