Order By not working for Global Products

Hi all,

We have a little problem with the themes ability to display Global Products on a MS deployment.

When using the 'Show global or just that main shop products on the front?' setting set to 'Global' the 'Order By' dropdown doesn't work. It just results in a blank page.

You can see here:

torgaming.co.uk/minimarkettest/

Whilst it works fine when set to local products, as you can see here:

torgaming.co.uk/minimarkettest/site2/

Thanks
Gavin