thanks garvin, way to make me feel stupid

You were correct!

you can see the problem here:

http://pookey.co.uk/blog/13-Brita-Breville-Aqua-Fountain-Review.html

and

http://pookey.co.uk/blog/

Any ideas what could cause that? It doesn't appear to be my template, as it's a single line in the template that's outputting these 4 rows

{$entry.plugin_display_dat ...