Changes in template background graphics are reverted after publishing

Question

I'm using the Watercolor theme, and as I'm using a page width of 800 pixels, I also wanted to change the width of the navbar background graphics from the default of 700 to 800 pixels. That was easy enough, the navbar background for e.g. the Watercolor blog is found in iWeb/Shared/Watercolor Blog.webtemplate, and is named navbar_gold2-1.jpg. I just changed the size of this in Photoshop from 90*700 to 90*800 pixels.
In iWeb all looks OK, the background width is correct (800 Pixels), but upon publishing the width is reverted to 700 pixels.
There must be another setting to do in order to get this right, but where?

Answer 1

The header width is hard coded in XML, you can modify it; but,
IMPORTANT: it is important to make copy of anything/everything you are about to modify, so you can restore it, in case you mess up.
To modify XML, open it with a text editor and search for bl:header-layer (I think), then look for width parameter.
If you really stuck, you could email Suzanne Boben at http://www.11mystics.com , Suz knows anything and everything about iWeb XML.
Other alternative is post processing after you publish, the problem can be resolved in one line of Javascript.