rss feed problems

I’m trying to ping to a swedish site, it worked fine with blogspot but not with my new wordpress-blog. I tried feedvalidator out and found two problems. One of them I have solved (changing RSS to Rss in some code.)

But the next I can’t figure out what to do.

I get this text:
“This feed is valid, but may cause problems for some users. We recommend fixing these problems.

line 26, column 3: Avoid content:encoded (10 occurrences) [help]

<content:encoded><![CDATA[Jag måste skärpa mig. Funkar inte att gå och …”

The [help] leads to this page: http://feedvalidator.org/docs/warning/DuplicateDescriptionSemantics.html

What do I do? I need to get my feed all valid so it works with this ping-site, because it’s from there I get most of my visitors..