Jens Lechtenboerger writes: > Without the second argument I get an error “Wrong type argument: > stringp,” when evaluating regular expressions against the cons cell > that is returned as title. > > As I see now, author and title are cons cells, which is why > org-element-interpret-data is necessary to produce strings with Org > syntax. > > Also, after fixing the title, I get “wrong-type-argument sequencep > utf-8” for “(concat "text/html;charset=" charset)”. Thanks for testing this :) I haven't forgotten about this. Next version!