Issue with attribute (combination selection)

[Porpoise]

Hi all,

 

I'm slowly progressing with our new website (v.1.5.2.0 [reverted back from an aborted 1.5.3.1]) but yet another issue has cropped up on my associate's PC (W7 x64 - IE9) which I can't replicate on any of my machines.

 

When on the product page, when selecting an option from the drop-down list if you select each option in turn (to see the different prices for example) every time, on the 3rd selection, it throws a wobbly and displays a weird not properly formatted page and the page locks-up - you have to go right back to the 1st page and start again.

 

Does anyone have any idea what the cause and solution might be?

 

Thanks.