Gaps between sections on last row of printed pages...

I have a report with a detail section and report footer.
I notice that on some pages where there isn't enough space to insert one more detale section, it doesn't start the footer section where you would expect.
In other words, I get the last detail line for the page, a gap, then the report footer.
Other pages I get the detail line, no gap and then the report footer like you would expect.

Is there a setting or something to tell crystal to "raise" the report footer section so it always appears immidiently after the last printed row?