Calibre: Double and single quotes in xml-tags.
I send fb2 files to Sony Reader by Calibre. Calibre changes in fb2 file the line of the form <?xml version="1.0" encoding="utf-8"?> on line <?xml version='1.0' encoding='utf-8'?>. So double quotes are replaced with single, and my Sony PRS T1 can't just open the file. If I edit the line by HTML-editor right on device, book opens - welcome to read.
Question: what do I wrong with Calibre?