Menu tree empty when active path is overriden

Hi,

When the module runs its magic, it determines the menu item to set active correctly (in main-menu), but when it calls menu_tree_set_path() in menu_trail_by_path.module on line 63, in that function, there are no paths to set active. That is, in menu.inc after line 1181: $paths is NULL.

The 'parent' page is a view page. The 'child' are node detail pages.
The main-menu is rendered as a menu-block using context.

We do have installed:
1. menu modifiers

• menu_admin_per_menu
• menu_block
• menu_target

Are there know issues with any of these?

2. Also using hook_page_delivery_callback_alter()

• context

Might the combination of menu-block and context be the cause of this?

I'll continue to investigate this, but suggestions or insights are most welcome.

Greetings,
Andreas