Crash on switching between accounts while editing

This is the original traceback I received:

Application Identifier: com.hardcoded_software.moneyguru
Application Version: 2.3.10

Traceback (most recent call last):
 File "/Applications/moneyGuru.app/Contents/Resources/mg_cocoa.plugin/Contents/Resources/mg_cocoa.py", line 1116, in setCurrentPaneIndex_
 File "core/gui/main_window.pyc", line 405, in current_pane_index
 File "core/gui/main_window.pyc", line 87, in _change_current_pane
 File "core/gui/account_view.pyc", line 38, in show
 File "core/gui/base.pyc", line 268, in show
 File "core/gui/transaction_table_base.pyc", line 43, in show
 File "core/gui/base.pyc", line 129, in show
 File "core/gui/transaction_table_base.pyc", line 40, in _revalidate
 File "hscommon/gui/table.pyc", line 257, in refresh
 File "hscommon/cocoa/inter.pyc", line 55, in refresh
 File "hscommon/cocoa/inter.pyc", line 132, in saveEdits
 File "hscommon/gui/table.pyc", line 264, in save_edits
 File "hscommon/gui/table.pyc", line 296, in save
NotImplementedError

with the description of how it happened:

I was changing from one account/tab to another. I had changed the comment field on a transaction and went to the next account without saving the change. The changed text then appeared both on the original transaction and on the transaction on which I landed in the second account. This definitely happened. I am not 100% sure that this lead to the error, but I think so.

I couldn't reproduce the exact same error, but something similar by doing the following:

1. Have two accounts opened, one with many txns, the other with less txns.
   
2. Start editing the txn in the first account that corresponds, index-wise, to an uneditable row (like the total row) in the second account).
   
3. Switch from one account to the other without "properly" ending the current edit.
   
4. crash.