Does not work to remove hard coded font sizes. I use this option a lot fr removing embedded fonts but it does not seem to change the "font-size: x.xxxxx em;" lines.
I just downloaded 9.7 and no change.
I can manually delete these lines, change them to 1em, or convert to mobi and back to epub.
These all work, but using the filter style information does not work for me in this particular area.
What am I doing wrong or missing?