Undefined context in admin/panels/panel-page/PANELPAGE/edit/general

The exact message is

warning: array_merge() [function.array-merge]: Argument #2 is not an array in /home/websites/drupal/sites/all/modules/panels/includes/plugins.inc on line 95.

The backtrace at this point is

#0  panels_optional_context->add_empty() called at [/home/websites/drupal/sites/all/modules/panels/includes/plugins.inc:104]
#1  panels_optional_context->select(, ) called at [/home/websites/drupal/sites/all/modules/panels/includes/plugins.inc:755]
#2  _panels_context_select(, panels_optional_context Object ([keywords] => any,[title] => Taxonomy: Term ID), ) called at [/home/websites/drupal/sites/all/modules/panels/includes/plugins.inc:743]
#3  panels_context_select(, Array ([0] => panels_optional_context Object ([keywords] => any,[title] => Taxonomy: Term ID)), ) called at [/home/websites/drupal/sites/all/modules/panels/panels.module:730]
#4  panels_pane_select_context(stdClass Object ([pid] => 67,[did] => 15,[panel] => left_top,[type] => views,[access] => Array (),[configuration] => Array ([view] => view_ressort,[type] => embed,[override_title] => 1,[override_title_text] => ,[link_to_view] => 0,[use_pager] => 0,[pager_id] => 1,[nodes_per_page] => 1,[offset] => ,[panel_args] => 0,[args] => 241/content_artikel_aufmacher,[url] => ),[position] => 0,[subtype] => view_ressort), ) called at [/home/websites/drupal/sites/all/modules/panels/includes/plugins.inc:485]
#5  panels_get_pane_title(stdClass Object ([pid] => 67,[did] => 15,[panel] => left_top,[type] => views,[access] => Array (),[configuration] => Array ([view] => view_ressort,[type] => embed,[override_title] => 1,[override_title_text] => ,[link_to_view] => 0,[use_pager] => 0,[pager_id] => 1,[nodes_per_page] => 1,[offset] => ,[panel_args] => 0,[args] => 241/content_artikel_aufmacher,[url] => ),[position] => 0,[subtype] => view_ressort)) called at [/home/websites/drupal/sites/all/modules/panels/panels_page/panels_page.admin.inc:234]

The problem is that in panels_get_pane_title() $display is used but not defined.

--
Olav