XML issues

Hi,

I’m trying to validate my RSS feed in Feedburner and keep getting this:

This feed is valid, but interoperability with the widest range of feed readers could be improved by implementing the following recommendations.

line 15, column 62: Image link doesn’t match channel link

line 15, column 164: Image title doesn’t match channel title

line 16, column 150: Unregistered link relationship: search

Here is the whole of lines 15 and 16:

<image><link>http://creativecommons.org/licenses/by-nc-nd/2.0/</link><url>http://creativecommons.org/images/public/somerights20.gif</url><title>Some Rights Reserved</title></image>
<atom:link rel="search" type="application/opensearchdescription+xml" href="http://thelearnerobserver.com/osd.xml" title="the   learner   observer" />

I literally know NOTHING about this, have no idea how to change the XML file (if that’s even what needs to be done), and am completely lost. Please please please help!!!

http://feeds.feedburner.com/TheLearnerObserver