All these bugs are related to the RTF input plugin and have not been fixed:
http://bugs.calibre-ebook.com/ticket/5056
http://bugs.calibre-ebook.com/ticket/5055
http://bugs.calibre-ebook.com/ticket/5060
Is there some way to escalate them to a higher priority or to recategorize them so they're not ignored because they deal with LRF?
Thanks!