Panels IPE adds extra panes and panels_tab renders them as tabs

In the attached screen shot, you can see there are two extra tabs with no content or title in the last two tabs. The first three render correctly and are the only three present when the IPE is off. However two more show up as blank tabs.

I also included a dpm() of the panes that are being rendered. You can see two empty placeholder panes that IPE adds to preform it's magic.

This done on sites/all/modules/panels/panels_ipe/plugins/display_renderers/panels_renderer_ipe.class.php, lines 101 and 104 (of 3.7)

<?php
100     // Wrap the placeholder in some guaranteed markup.
101     $panes['empty_placeholder'] = '<div class="panels-ipe-placeholder panels-ipe-on panels-ipe-portlet-marker panels-ipe-portlet-static">' . $empty_ph . "</div>";
102 
103     // Generate this region's add new pane button. FIXME waaaaay too hardcoded
104     $panes['add_button'] = theme('panels_ipe_add_pane_button', $region_id, $this->display, $this);
?>

Now, I feel like this is wrong that Sam is adding panes when they are not really panes. The easy answer doesn't seem to work:

100     // Wrap the placeholder in some guaranteed markup.
101     //$panes['empty_placeholder'] = '<div class="panels-ipe-placeholder panels-ipe-on panels-ipe-portlet-marker panels-ipe-portlet-static">' . $empty_ph . "</div>";
102 
103     // Generate this region's add new pane button. FIXME waaaaay too hardcoded
104     //$panes['add_button'] = theme('panels_ipe_add_pane_button', $region_id, $this->display, $this);
105 
106     $output = parent::render_region($region_id, $panes);
108 
109     $output .= '<div class="panels-ipe-placeholder panels-ipe-on panels-ipe-portlet-marker panels-ipe-portlet-static">' . $empty_ph . "</div>";
110     $output .= theme('panels_ipe_add_pane_button', $region_id, $this->display, $this);
111     
112     $output = theme('panels_ipe_region_wrapper', $output, $region_id, $this->display);

Anyway, it'll be easy enough to patch panels_tabs to just render those panes with numeric pane ids, but that's not entirely correct either. I'll post an issue with the panel_ipe that this is screwing with things that expect real panels.

Patch forthcoming.