If the blank pages occur "after" the report, then the first thing to check out is your
printer driver.
XP requires the very latest printer drivers. In my experience, it usually doesn't
effect popular "basic" ink jet printers, but usually larger "office type" volume
printers... but that's not written in stone. Get the latest drivers, and then that can be
removed from the equation...
Have you tested the report on other printers? With what result?
Also, if there are any hidden or empty subreports, remove them (backup your original
report!) and see if that makes a difference.
Also, remove any ForceNewPage Before or After Sections that you may have in the report
sections, and test that.
(If blank pages occur on "every other page", recheck your report margins, and printer
margin minimum limits.)