I’ve been having a small but irritatingly persistent problem adding papers from the journal Levant (http://www.maneyonline.com/loi/lev, ISSN: 1756-3801): they’re imported into Paperpile as “Levantina” (and sometimes, I think, “Levantica”, although I may be imagining that.)
Obviously it’s not too difficult to work around, but it is annoying.