Menu item parent classes for page_for_posts (home.php) not properly set on single.php

[ptietz]

If one has set page_for_posts (Settings => Read), on single.php wp_nav_menu() will set current_page_parent for the accordant menu item, but it will not set any parent or ancestor classes for its parent menu items as expected. [tested with 3.3.1]

[drumba]

Same time the home menu entry gets the current-menu-item class.

[schlimpf]

Any updates on this?
I am experiencing the same error. Is this behavior intended?
The same error occurs when being in a category

As far as I can tell, the error does not occur with custom post types.

[chriscct7]

The problem seems to be in _wp_menu_item_classes_by_context