We recently upgraded to v6.7.2 from 5.x (I think it was v5.7.) and custom PDF space exports are huge compared to what they were with the previous version we ran. The last space export I have is 18MB, and the export of the space now - with very few modifications and some reductions to the stylesheet - is at almost 850MB. I was able to use Acrobat to reduce the PDF size to 250MB, but it is still too unwieldy to use. Why is Confluence outputting such huge files?