id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
14529	wp_nav_menu() gives different results when called multiple times - reproducable	juggledad		"If you call wp_nav_menu() with the same parameters twice, you get different results.

To reproduce 
1) use the TwentyTen theme 
2) add two categories: CAT-PARENT and CAT-CHILD 
3) add two pages: PAGE-PARENT and PAGE-CHILD 
4) add a menu, add the two categories and two pages and adjust them so the children are under the parents 
5) edit the header.php from twentyten and after line 67 (which should be 
'			</div><!-- #branding -->'
add
<?php 	
echo '<strong>wp_nav_menu=<br></strong>';
wp_nav_menu( array( 'container_class' => 'menu-xxx', 'theme_location' => 'primary' ) ); 
	echo '<strong>END wp_nav_menu<br></strong>';
?>
<?php 
echo '<strong>wp_nav_menu=<br></strong>';
wp_nav_menu( array( 'container_class' => 'menu-xxx', 'theme_location' => 'primary' ) ); 
echo '<strong>END wp_nav_menu<br></strong>';
?>
6) view the site and the generated source
This is the output of the two calls to wp_nav_menu():

First call results

<strong>wp_nav_menu=<br></strong>
<div class=""menu-xxx"">
	<ul id=""menu-cat_test"" class=""menu"">
		<li id=""menu-item-1408"" class=""menu-item menu-item-type-taxonomy menu-item-1408"">
			<a href=""http://wp301/?cat=3"">CAT-PARENT</a>
			<ul class=""sub-menu"">
				<li id=""menu-item-1409"" class=""menu-item menu-item-type-taxonomy menu-item-1409"">
					<a href=""http://wp301/?cat=8"">CAT-CHILD</a></li>
			</ul>
		</li>
		<li id=""menu-item-1413"" class=""menu-item menu-item-type-post_type menu-item-1413"">
			<a href=""http://wp301/?page_id=3"">PAGE-PARENT</a>
			<ul class=""sub-menu"">
				<li id=""menu-item-1411"" class=""menu-item menu-item-type-post_type menu-item-1411"">
					<a href=""http://wp301/?page_id=7"">PAGE-CHILD</a>
				</li>
			</ul>
		</li>
	</ul>
</div>
<strong>END wp_nav_menu=<br></strong>

second call result

<strong>wp_nav_menu=<br></strong>
<div class=""menu-xxx"">
	<ul id=""menu-cat_test-1"" class=""menu"">
		<li class=""menu-item menu-item-type-taxonomy menu-item-1408"">
			<a href=""http://wp301/?cat=3"">CAT-PARENT</a>
			<ul class=""sub-menu"">
				<li class=""menu-item menu-item-type-taxonomy menu-item-1409"">
					<a href=""http://wp301/?cat=8"">CAT-CHILD</a></li>
			</ul>
		</li>
		<li class=""menu-item menu-item-type-post_type menu-item-1413""><a href=""http://wp301/?page_id=3"">PAGE-PARENT</a>
			<ul class=""sub-menu"">
				<li class=""menu-item menu-item-type-post_type menu-item-1411"">	
					<a href=""http://wp301/?page_id=7"">PAGE-CHILD</a></li>
			</ul>
		</li>
	</ul>
</div>
<strong>END wp_nav_menu=<br></strong>

notice that the <li> in the first call have an id=""menu-item-nnnn"" and the second call doesn't have that. I know that an ID can only happen once in a page, but since there is a class with the same value, it would seem that neithor call should have an id=""..."" returned to be consistant.
"	defect (bug)	closed	normal		Menus		normal	invalid