PDF compressing??

I have a couple of questions... :



1-Is there any software outhere that can really compress pdf files other than that lame ';Free PDF Compressor 1.12';?

2-How come when i change a pdf file that has 600kb at first, then when i save it, the size go up to 10 megas?

3-Is there any good software that can allow me to change whatever i want on a pdf file like adding pictures deleting text...etc???PDF compressing??
i have answer to your third question

Gud pdf editor

http://www.foxitsoftware.com/pdf/pe_intr



which in turn is a solution to rest two, i have been using this since long and size of pdf files dont change much, so u dont need a pdf compressor :)



If the size of pdf has increased you can make a pdf out of it again and check wether the size has reduced or not.

You can use Primo Pdf (http://www.primopdf.com) for the same