Logged In: YES 
user_id=805804

Here is an extraction from my page.html:

   <a tal:define="your_issues python:i18n.gettext('Your
Issues')"
      tal:attributes="href
string:issue?@sort=-activity&@group=priority&@filter=status,assignedto&@columns=${columns}&status=${status_notresolved}&assignedto=${request/user/id}&@dispname=${your_issues}"
  
      tal:content="your_issues">Your Issues</a><br>

(...)

    <a href="#" 
       tal:define="show_ua python:i18n.gettext('Show
Unassigned')"
       tal:attributes="href
string:issue?@sort=-activity&@group=priority&@filter=status,assignedto&@columns=${columns}&status=${status_notresolved}&assignedto=-1&@dispname=${show_ua}"
		   tal:content="show_ua">Show Unassigned</a><br>
    <a href="#"
       tal:define="show_all python:i18n.gettext('Show All')"
			 tal:attributes="href
string:issue?@sort=-activity&@group=priority&@filter=status&@columns=${columns_showall}&status=${status_notresolved}&@dispname=${show_all}"
       tal:content="show_all">Show All</a><br>