Why does my configure run well on the version updated at 9/05/2012, can not run on the others versions updated after 9/05/2012

[SunshineTech]

In my magento application, there is a configure in layout.xml:

[default]
[reference name="head"]
[action method="setTemplate"][template]SunshineBiz_Permission::page/head.phtml[/template][/action]
[action method="setTitle" translate="title"][title]Backend Admin[/title][/action]
[/reference]
[reference name="menu"]
[action method="setTemplate"][template]SunshineBiz_Permission::menu.phtml[/template][/action]
[/reference]
[reference name="footer"]
[action method="setTemplate"][template]SunshineBiz_Permission::page/footer.phtml[/template][/action]
[/reference]
[/default]

On the version updated at 9/05/2012, it runs well. But it can not run on the version updated at 9/13/2012 and 9/27/2012. It run a long time, and display a blank page. Forthermore, there aren't logs in system.log, no warn, no error, nothing. I have to change the configure by removing the "menu" reference as following:

[default]
[reference name="head"]
[action method="setTemplate"][template]SunshineBiz_Permission::page/head.phtml[/template][/action]
[action method="setTitle" translate="title"][title]Backend Admin[/title][/action]
[/reference]
[reference name="footer"]
[action method="setTemplate"][template]SunshineBiz_Permission::page/footer.phtml[/template][/action]
[/reference]
[/default]

Then it can run. Why is it so? How can I change the menu's template?
Any suggest is welcome!

[Forestsoft-de]

The Block menu you are reference doesn´t exist !?

[SunshineTech]

The Block menu exists in Mage_Backend. But the configure ablout Block menu in layout.xm are dfferent in the version updated at 9/05/2012 and the version updated after 9/05/2012.

The configure ablout Block menu in layout.xm in the version updated at 9/05/2012:

[default]
[reference name="root" after="header"]
[block type="Mage_Backend_Block_Menu" name="menu" as="menu" template="Mage_Backend::menu.phtml"]
[block type="Mage_Backend_Block_Menu_Container" name="menu_container_renderer" template="Mage_Backend::menu/container.phtml" /]
[block type="Mage_Backend_Block_Menu_Item" name="menu_item_renderer" template="Mage_Backend::menu/item.phtml" /]
[action method="setContainerRendererBlock"][renderer]menu_container_renderer[/renderer][/action]
[action method="setItemRendererBlock"][renderer]menu_item_renderer[/renderer][/action]
[/block]
[/reference]
[/default]

The configure ablout Block menu in layout.xm in the version updated after 9/05/2012:

[default]
[reference name="root" after="header"]
[block type="Mage_Backend_Block_Menu" name="menu" as="menu" template="Mage_Backend::menu.phtml" /]
[/reference]
[/default]

[magento-team]

Navigation classes were recently refactored. Can you let us know if you solved your issue with your findings from the last comment?

[SunshineTech]

I can not solve the issue until now!