I am using pattern in illustrator in separated layer of course and some text areas and line texts in another layer... when I save the file to a PDF format I got a very bad result as seen as the attached file is. it seems that every single object in the artwork takes a stroke. the area box takes a very tiny stroke as well as the line text and the patters in the background takes a little stroke too. the result is a whole mess. I figured out the problem is related to the pattern because when i remove it it solve the problem. so do you have any idea how to deal with that?