My guess is that you have last field in the image (the long expanding text) set to 'keep together' = true
In you example it is pushing the next row to the next page which makes it appear that ther is a blank row at the bottom of pages.
if you uncheck that (set it to false) on that field you may get what you want.
if not can you post an image (or url) of the design screen of the report
Edited by DBlank - 04 Dec 2013 at 8:12am