Hi,
 When calling org-bibtex-read on a fresh emacs on a text which is not a .bib file, we get the following error: bibtex-parse-entry: Wrong type argument: stringp, nil

This problem is solved if the (bibtex-set-dialect) function is called before. Note that this function is called automatically the first time a .bib file is opened, so many users may not have seen this problem.

I don't know what the right fix would be though. For now I call (bibtex-set-dialect) in my init.el, but maybe org-bibtex-read should do it?

Thank you for org-mode!
Matthieu