Hi, Thanks for the bug report that has a good analysis. Please find attached a patch that works for me. Tell me if it's ok for you.
Added tag v0_3_12 for changeset a4646f15c34a
Fix python3 conversion bug.
Remove useless 'no' locale, replaced by 'nb' et 'nn'.
To differenciate releases for python3.
Fix cover page layout when author is missing.
Example of publisher setup.
Change the default cover page rendering.