Forcing updates for custom fields

I have an RSS feed being generated on another server, which generates posts through FeedWordPress. I have a number of custom fields being mapped from the RSS feed to the custom fields of the posts, which are important. Unfortunately, when FeedWordPress updates, it does not check to see if the values of these custom fields are different from the new RSS feed, and therefore does not update the entire post.

However, if I update the description, then it does consider the post “updated” and it updates the description as well as all of my custom fields along with it (presumably because the “description” RSS element is considered a major part of the post).

Is there a way to let FeedWordPress consider the other custom RSS elements when deciding when to update everything, or better yet, just update every post’s custom fields from the new RSS regardless?

http://ww.wp.xz.cn/plugins/feedwordpress/