[-] BO : fix #PSCFV-4846

themes/default/breadcrumb.tpl

@@ -29,7 +29,7 @@
 <div class="breadcrumb">
 	<a href="{$base_dir}" title="{l s='return to Home'}"><img src="{$img_dir}icon/home.gif" height="26" width="26" alt="{l s='Home'}" /></a>
 	{if isset($path) AND $path}
-		<span class="navigation-pipe" {if isset($category) && $category->id_category == 1}style="display:none;"{/if}>{$navigationPipe|escape:html:'UTF-8'}</span>
+		<span class="navigation-pipe" {if isset($category) && isset($category->id_category) && $category->id_category == 1}style="display:none;"{/if}>{$navigationPipe|escape:html:'UTF-8'}</span>
 		{if !$path|strpos:'span'}
 			<span class="navigation_page">{$path}</span>
 		{else}