Wrong Images in Shopping Cart

On some of our products which have several secondary images and several options or characteristics, Hikashop doesnt always pick up and display the main default image in the shopping cart view.
Is there any way to force it to always select the main image as default in the shopping cart. At the moment the selection seems pretty random.
We are running Business version of Hikashop.
Thanks

Ahh No. We're running version 1.5.6. We'll install latest version 1.5.7 and will advise if still not fixed.
Much appreciated.

HI Nicolas,
We just attempted the standard upgrade from 1.5.6 to 1.5.7 and it's completely thrown out all our custom built CSS/template etc.
We had downloaded and installed the full Business package that was available on my Hika Account for this.
Is there any way you could let us know which of the core files were changed in the latest version so we can attempt a manual update via FTP?
Or provide an update package if you have one? Maybe that will fix the issue.
Much appreciated.

To add to this, it may well actually be a Joomla related issue. My tech guy updated Joomla to 2.5.4 immediately before installing latest version of Hika.
Has anyone else encountered div related issues with the latest joomla core build that came out today?

I have the same problem as the original post. When we go to the checkout page MOST of the products are showing their secondary images. I am running Business version 1.5.7. Any ideas if there is a way I can force the first image to load on the checkout page. We do not have any custom CSS. This is just a standard install.

Thanks

I wish I could, but it is a secure site. I know that makes things much harder. Any suggestions?