[@richardjeanderson Member 18 years, 3 months ago]

I’ve reuploaded bbpress – makes no difference.

I’ve removed plugin (display_name.php)

I temporarily renamed my_templates folder to return back to default template.

The forum now sits at http://www.learning2goblog.org/forum

Click any of the tags and it takes you to the correct page. Click on the breadcrumb to take you back to tags.php and it dies as described.

All very strange . . . .