Shortcode rendering issue after update to 2.9.03

Just updated to Marketpress 2.9.03 and the [mp_list_products] shortcode has gone all batty on us.

It renders the shortcode content twice - once right after the <body> tag and once more where we want it.

It also renders above the content entered (in the editor the shortcode is after a bit of text)

Nothing else has changed with the site and not getting any conflict errors in Chrome inspector.

I've hidden it using css so that the site can function as normal - you'll have to view source code to see what I'm talking about but I definitely need to figure out what went wrong and how to fix it.

Any help you can give me is much appreciated!