New comments do not show new color

Sorry to be the problem child this week. I have this really purrrrty legend, that indicates that new comments should be in dark yellow and old comments in pale yellow in the discussion list, but the actually posts do NOT change color when they have a new post. The only indication is that there is a little red number after the word "new." I thought the CSS for the legend would be the same as the CSS for the posts, but something's not right. Any ideas? http://www.mormonmomma.com/board
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