Apple says to avoid using pixel fractional measurements for letter spacing, font size, and text placement. Since it happens in the conversion to html and css formatting. Is there a way I can control this?
Has anyone had their book rejected because of this?
This may not be the droids you are looking for, but one way to check after the fact would be to create a copy of your epub, rename the epub to [epubnam].zip (change .epub to .zip), and then search the generated css file for .0px, .1px, .2px ... (if you are handy with regular expressions, you could do a bit better by searching for \.[0-9]*px I checked this quickly at regexpal.com, but more robust testing may be in order)
If you do find a fractional value, you could "correct it" to the closest non fractional value that doesn't trash your design, and repackage the epub.
FWIW, I did a quick scan through my epub css and did not find any fractional values.
Thanks for the replay!
Yeah, that seems to be the way to go. I did some tests and it's imperceptible if you round up to the next integer.