I'm trying to autofeed posts to facebook. I'm using RSS graffiti and having the following issue: Taken from - http://rssgraffiti.pbworks.com/w/page/28597477/ERR_MISSING_PUBLICATION_DATE
One or more feed entries do not indicate their date of publication.
In RSS for example, there is an element called pubDate which indicates the date when the item was published (created). RSS Graffiti relies on that date to distinguish between old and new items. Every time an item is posted on your wall, RSS Graffiti writes down the date it was published (as indicated by the pubdate field in your feed) and from then on, it looks only for items newer than that, to continue publishing on your wall. If the publication date is missing (not supplied by the feed), then RSS Graffiti has no other way of knowing if the item is new or not and whether it has already been published on your wall or not. As a result items without a publication date are not posted at all on your wall.