webkit browsers intermittently show image in slideshow off to the right of the slideshow

I didn't notice this when I launched the site, but built my new mac and its happening in both chrome and safari.

http://coatesconstruc开发者_运维百科tion.co.uk/

The image in the slideshow is off to the right, as if it's not following the positioning it's supposed to. Before I spend ages digging in the CSS, is this something you gurus have seen before and know the quick fix for? Or, do I need to swap to a different slideshow script?

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<img style="border-left-width: 450px; 
border-left-style: solid; border-left-color: rgb(0, 0, 0); border-right-width: 450px;      
border-right-style: solid; border-right-color: rgb(0, 0, 0); opacity: 1; " 
src="/media/photographs/fp001.jpg">

There's a 450px border-left on the image, that's probably the cause

Also your div #fullsize has no overflow:hidden; specified, which leads to a side scrolling page in Chrome 12 on XP