File-Compare-Leo-Files creates "other file" clones

Test procedure:

1) Start a console.

2) Let leomy be your script for starting Leo-Editor.
Suppose there is no file named "d1.leo" in the current working directory.
Execute command line: "leomy d1.leo"
This creates file d1.leo containing one node with headline "d1.leo".
Ctrl-S -- Write d1.leo
Alt-F4 -- Exit Leo-Editor

3) Suppose there is no file named "d2.leo" in the current working directory.
Execute command line: "leomy d2.leo"
This creates file d2.leo containing one node with headline "d2.leo".

4) Alt-c, f, c -- This pops up a file selection menu allowing you to pick the "other" Leo-Editor file to be compared to the current Leo-Editor file (d2.leo).
Pick file d1.leo.
This causes the comparison to be done.
This creates a subtree rooted by a node with headline "Compare .leo Files".

Note the messages output to the terminal:

 inserted (only in /home/ldi/tmp/d1.leo)
('bob05', '20130326174836', '1409') d1.leo

 deleted (only in /home/ldi/tmp/d2.leo)
('bob05', '20130326174847', '1409') d2.leo

 changed

-----
I believe released code should not to print such non-error messages on the terminal.
---------

5) Alt-o, x, a -- Expand all nodes

Note that node "Compare .leo Files-->inserted-->d1.leo" is marked as a clone.
This indicates a serious problem because the clone of this node is in the "other" .leo file. This is a "cross-file" clone link that as far as I know is not allowed.

Now try either step 6a) or 6b). They generate slightly different errors.

6a) Now try to select node "Compare .leo Files-->inserted-->d1.leo" by left-clicking it.
Note that the node is NOT selected--But note the errors on the terminal.

6b) Press Alt-downArrow 4 times. Note no errors have been reported.
Press Alt-downArrow a 5th time.
Note the errors displayed in the log pane and the the terminal.
---------
6a errors shown only in the terminal:

Traceback (most recent call last):
  File "/home/ldi/bzr/LeoLatest/leo/plugins/baseNativeTree.py", line 664, in onTreeSelect
    self.select(p)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoFrame.py", line 2046, in select
    val = self.selectHelper(p,scroll=scroll)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoFrame.py", line 2070, in selectHelper
    assert p.v.context == c
AssertionError
------

6b errors on terminal:
exception executing command
Traceback (most recent call last):

  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 560, in doCommand
    val = command(event)

  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 6657, in selectVisNext
    c.treeSelectHelper(p)

  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 6691, in treeSelectHelper
    c.selectPosition(p)

  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 8230, in selectPosition
    c.frame.tree.select(p)

  File "/home/ldi/bzr/LeoLatest/leo/core/leoFrame.py", line 2046, in select
    val = self.selectHelper(p,scroll=scroll)

  File "/home/ldi/bzr/LeoLatest/leo/core/leoFrame.py", line 2070, in selectHelper
    assert p.v.context == c

AssertionError
-------
6b) errors in red in log pane:

exception executing command
Traceback (most recent call last):
  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 560, in doCommand
    val = command(event)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 6657, in selectVisNext
    c.treeSelectHelper(p)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 6691, in treeSelectHelper
    c.selectPosition(p)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoCommands.py", line 8230, in selectPosition
    c.frame.tree.select(p)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoFrame.py", line 2046, in select
    val = self.selectHelper(p,scroll=scroll)
  File "/home/ldi/bzr/LeoLatest/leo/core/leoFrame.py", line 2070, in selectHelper
    assert p.v.context == c
AssertionError

--------

I use Xubuntu 12.04 (precise)
Kernel 3.2.0-39-generic

Leo Log Window
Leo 4.11 devel, build 5639, 2013-03-24 11:01:23
Python 2.7.3, qt version 4.8.1
linux2
setting leoID from os.getenv('USER'): 'bob05'
load dir: /home/ldi/bzr/LeoLatest/leo/core
global config dir: /home/ldi/bzr/LeoLatest/leo/config
home dir: /home/bob05
reading settings in /home/ldi/bzr/LeoLatest/leo/config/leoSettings.leo
reading settings in /home/bob05/.leo/myLeoSettings.leo