Printing Contact sheet of multiple jpg photos

IN Vista when you print a contact sheet of photos vista automatically figure
out the best way to orient each photo (potrait or landscape) so that if you
print a contact sheet some photo on the sheet are portrait and some are
landscape.

This didn't happen in XP. Progress is measured in small steps - but does
anyone know how to stop this. Kind of useless that Vista decides what's best
for me (and decides wrong).

Thanks