I have a big artwork which I have tiled to 41 pages.
Saving the 18 MB Illustrator file as Press Quality PDF 1.3 creates a 750 MB file, which made me wonder if everything is ok. (No, I don't have the illustrator editing capabilities on).
Now that I have been troubleshooting, I noticed the PDF pages all contain the whole artwork, which actually ads quite appropriately 41 * 18MB=738MB. Everything else but the tiled page is masked behind. I noticed this by opening a single PDF page and checking cmd-Y Preview.
Is this a feature of CS3 multipage, or can I somehow make true multipage PDF's where only the artwork on specific tile will be on the PDF page?
Building a "multipage" document in CS3 is nothing more than print tiling. When you export a PDF from Illustrator, objects which cross the bounds of the "pages" or crop areas just get masked by a clipping path.
Illustrator doesn't even provide a proper means by which to crop its own native artwork in the native working interface. Little wonder that it also doesn't actually trim objects when exporting PDF pages.
That's what I was afraid of. I'm gonna have to see if printing a PS and distilling PDF is an option, because otherwise I'll end up with up to 2 GB PDF's.