Apologies for all the replies.
It appears to be something triggered by embedded fonts. If the original file doesn't have embedded fonts, it just gives me the two usual .css files. If there *are* embedded fonts, it spawns the two page_styles.css files. I have "remove embedded fonts" turned on in my preferences, no fonts show up in the stylesheet.css file.
It never happened on the previous version I had, it's the newer 3.0 64bit version.
It's not life altering, it's just annoying.
Under "Preferences>Common Options>Look & Feel>Transform Styles" I have (now) 4 rules:
1) If line-height equals any value, remove it
2) If text-align equals justify, remove it
3) If Font-family equals any value, remove it
4) if font-size is less than 1, change it to 1em (my eyes are bad)
I hope this will kill the problem.
UPDATE: Nope, it didn't.
