Header suddenly broken?? Smugmug resized image?

Stustaff

My header is suddenly not looking right!

my CSS is for a 750 by 100 image all of a sudden though the "O" image linked to on smugmug is now 600 by 80 why has it shrunk?
The image was always 750 by 100 and worked fine as of a few hours ago now though its like it has been resized by smugmug! anybody know whats happening? the original image can still be seen on my home page here www.belperphoto.co.uk.





CSS is
/* SHOWS BANNER ON HOMEPAGE AND OTHER SECTION */
.homepage #my_header,
.category_Photography #my_header {
display: block;
background: url(http://stuarthill.smugmug.com/photos/74593491-O.jpg);
height: 100px;
width: 750px;
}

But if I choose a large size image it is now at 750 by 100 as it should be!? why is the Original image suddenly been changed?

Andy

Stuart, I'm checking into it. For now, change your link to the -L.

Andy

Stuart, you had Originals blocked. We unblocked them, and now your Orig shows up fine.

Stustaff

Thanks Andy

I did a batch change and must of accidently included that gallery ! Silly me.