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There is a break in the background image. The div class "subgroup" has a margin-bottom:12px which I suspect is causing it, because no other pages have the problem. The main background image is in the div "wrapper". "subgroup" is within that, I wouldn't have thought a margin of a div, contained within another div, would cause the containing div to expand without the background image? Its sort of acting like the container div had the margin, which it does not.
Would appreciate any help. Thank you!