Upgrade StorageBug in bibtex import => pdf lost
the problem can be easily seen by making an export from zotero to bibtex, and then import from bibtex to zotero (w/o jabref). => the pdf is lost.
also in discussion:
http://forums.zotero.org/discussion/18923/import-from-jabref-with-pdf-attachments/
also in discussion:
http://forums.zotero.org/discussion/18923/import-from-jabref-with-pdf-attachments/