I looked at the file "
dpi-Julia99r-modified.xls" you sent and it is perfect. I previewed & printed it on 100%, 120% & 125% dpi . It is the same on all settings - the pagebreaks & margins incorporate all the text perfectly !!
There is just one "grey" row missing at the bottom of each page which I think you may have only omitted when you setup what ever you did. I have attached 2 pages of the spreadsheet to show you the missing lines which I have marked with a purple text box & arrow (row is also missing on page 3,4,& 5 ). So next thing is you need to explain to me what you did to correct my problem & how !!