Yes, it alters the position and frequency of the lines.

There doesn't seem to be any clear pattern to these lines; but two renders with the same settings will produce lines in exactly the same places.

I have learnt to live with it, I just use my "one pixel vertically offset background fix" to get rid of them!

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)