Alignment of image problem

I've created this page for a client keith-bowen.php

My problem is that I've tested it on 4 PCs, Google Chrome, IE 8 and Firefox, and the main (large) image is centrally aligned (as it should be) on all of my equipment. However my client has a Widescreen Monitor/PC 1600 x 900, using Mozilla Firefox, is seeing the main image right aligned. Is this a cache issue or is there a problem with my page - I'd really appreciate any help please? THANK YOU

Am viewing in Firefox 0n 1900 x 1200 and images are perfectly centred.

THANK YOU Neil - It's probably a cache problem on my client's PC then?

That's certainly possible, and worth having your client check it out.

Thank you Neil - This has now worked!

Although our client can see the large image centre aligned in the sample gallery page, the images are centre aligned:-

index.php?gallery=6&theme=light

However when he examines our page using the same gallery style (the only element we've changed in the stylesheet is the background colour to match with his website). Unfortunately he has again told us that "There is an outline box centred but the image is still over to the right, although a bit less so than before."

keith-bowen.php

As we have not changed anything else, what could be making the large image right aligned, could the alignment be affected by the size of the uploaded image?

We've now created a workaround by including the php in a table - This has resolved issue...

ok, glad to hear it is working now.