Warning! Distro version of calibre ahead!
Please uninstall your distro calibre and re-install the version on calibre's website.
There is no official support for distro calibre packages, only errors which can be duplicated with the official binaries.
Distros mess around with the sources too much -- besides for being terribly out of date usually.
EDIT: crosspost, and I see you still have the problem.
Must reload page more often.
