For some reason the source of inserted images gets a relative path. Which leads to the images not being loaded if the feed is consulted from outside the confluence pages.
      The example below is a feed of a blog post with an inserted image:

      <summary type="html"><div class="feed"> <p>
      Blog post
      <b>edited</b> by
      <a href="http://foo.bar.com/display/~RSSFEED">rss receptie</a>
      </p>
      <div style="border-top: 1px solid #ddd; border-bottom: 1px solid #ddd; padding: 10px;">
      <p><span class="image-wrap" style=""><img src="/download/attachments/9930922/foobar.jpg?version=1&amp;modificationDate=1345708056364" style="border: 1px solid black" /></span><br/>
      test</p>
      </div>
      <div style="padding: 10px 0;">
      <a href="http://foo.bar.com/display/TEST/2012/08/23/Test">View Online</a>

      <a href="http://foo.bar.com/display/TEST/2012/08/23/Test?showComments=true&showCommentArea=true#addcomment">Add Comment</a>
      </div>
      </div></summary>

          Form Name

            [CONFSERVER-26404] RSS feeds: relative path for inserted images

            I can confirm this is no longer the case in Confluence 4.3.2:

                <summary type="html">&lt;div class="feed"&gt;    &lt;p&gt;
                    Page
                        &lt;b&gt;added&lt;/b&gt; by
                                &lt;a href="http://localhost:10432/display/~admin"&gt;admin&lt;/a&gt;
                        &lt;/p&gt;
                    &lt;div style="border-top: 1px solid #ddd; border-bottom: 1px solid #ddd; padding: 10px;"&gt;
                    &lt;p&gt;&lt;img class="confluence-embedded-image" src="http://localhost:10432/download/attachments/1146898/foobar.jpg?version=1&amp;amp;modificationDate=1353206916365" data-image-src="http://localhost:10432/download/attachments/1146898/foobar.jpg?version=1&amp;amp;modificationDate=1353206916365"&gt;&lt;/p&gt;
                &lt;/div&gt;
                    &lt;div style="padding: 10px 0;"&gt;
                   &lt;a href="http://localhost:10432/display/ds/image"&gt;View Online&lt;/a&gt;
                                 &amp;middot;
                   &lt;a href="http://localhost:10432/display/ds/image?showComments=true&amp;showCommentArea=true#addcomment"&gt;Add Comment&lt;/a&gt;
                       &lt;/div&gt;
            &lt;/div&gt;</summary>
            

            Denise Unterwurzacher [Atlassian] (Inactive) added a comment - I can confirm this is no longer the case in Confluence 4.3.2: <summary type= "html" >&lt;div class= "feed" &gt; &lt;p&gt; Page &lt;b&gt;added&lt;/b&gt; by &lt;a href= "http: //localhost:10432/display/~admin" &gt;admin&lt;/a&gt; &lt;/p&gt; &lt;div style= "border-top: 1px solid #ddd; border-bottom: 1px solid #ddd; padding: 10px;" &gt; &lt;p&gt;&lt;img class= "confluence-embedded-image" src= "http: //localhost:10432/download/attachments/1146898/foobar.jpg?version=1&amp;amp;modificationDate=1353206916365" data-image-src= "http://localhost:10432/download/attachments/1146898/foobar.jpg?version=1&amp;amp;modificationDate=1353206916365" &gt;&lt;/p&gt; &lt;/div&gt; &lt;div style= "padding: 10px 0;" &gt; &lt;a href= "http: //localhost:10432/display/ds/image" &gt;View Online&lt;/a&gt; &amp;middot; &lt;a href= "http: //localhost:10432/display/ds/image?showComments= true &amp;showCommentArea= true #addcomment" &gt;Add Comment&lt;/a&gt; &lt;/div&gt; &lt;/div&gt;</summary>

              Unassigned Unassigned
              a1d565038225 Bart Horré
              Affected customers:
              0 This affects my team
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                Created:
                Updated:
                Resolved: