First off, thanks for reading this thread and trying to help.
Ok, my site: http://wrdclark.freehostia.com/
Customising the 'Spreeksel' Theme to be vaguely Vista-ish. The main background (applied to the 'content' div) is bizarrely offset in IE6. It kicks it 700px+ to the right. When i re-position it using conditional comments, the left side of the image doesn't appear at all, as if it has been cut off, or covered.
In IE7 it's fine (I mainly test in IE7). Can't remember the Firefox result at the moment.
If you have any ideas, please let me know.