Originally Posted by robko
In that case you should be able to strip the formatting with calibre and then you'll be able to turn off justification. A number of threads around on how to do this and you might only need to strip out the justification part of css file to let you do this.
I did not know that Calibre could be used for that. How do you do it? Converting epub to epub? I have been using Sigil to edit the css file...