I am creating a PDF file from InDesign and sometimes(90% of the times) when I export my work from InDesign into a PDF file a strange annoying 1px line appears(view immage) at the edge of the document... Did you ever had this problem? Why does it appear ?
This is called stitching. You can turn off smooth line art or use any of these solutions: http://kb2.adobe.com/cps/403/kb403359.html
Problem is know from CS2+
I have a solution, please follow the steps below, it will help you:
Export to PDF doesn't add anything to the document. I can think of a couple of straightforward possibilities for what you're seeing. The most likely, based your example, would be an unintended grey stroke on the rectangle that fills your document. I was able to reproduce your sample using a 25% black 1 pt stroke. Since the default position for a stroke is Centered, you end up with a 1/2 pt visible inside the document boundary. If you set a stroke color with no documents open, then later closed InDesign, a 1 pt stroke of that color would become a default for any new shapes or strokes.
You can also see something similar to this if your content almost fills the page, but not quite, but this doesn't have that appearance.
You can test either of these by extending the rectangle beyond the page into the bleed space, then exporting the PDF without bleed.
If neither of these changes the situation, reset your InDesign preferences (Ctl-Alt-Shift or Cmd-Opt-Shift while the program is loading) and try again.
protected by Matt♦ Aug 29 at 13:51
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