Certain html entities get double encoded

I have the same problem with 7rc3, outpout ' or & But for all custom rss fields.

I had to overrride theme.inc / template_preprocess_views_view_views_rss and add
ln 710 $value = htmlspecialchars_decode($value, ENT_QUOTES); because of

ln 878 format_xml_elements() that use check plain() that use htmlspecialchars() that reencode the string.

Fixed in 6.x-2.x (+ fix's fix) and 7.x-2.x.

I'm not sure if it's related, but I get an error with my feed that seems related to this.
The feed URL is: http://journalisten.no/feed/rss.xml

In the views preview I get the following code, which shows that å (html entity: å) is double encoded as å, which I think it should be ok, since in xml the entity å is not defined, but as you can observe in the feed i linked above this leads to some encoding issues! (PS: the same goes for ø, which is ø )

<?xml version="1.0" encoding="utf-8" ?><rss version="2.0" xml:base="http://journalisten.no/feed/rss.xml" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <channel>
    <title>Journalisten Feed</title>
    <link>http://journalisten.no/feed/rss.xml</link>
    <description>Journalisten.no Strøm</description>
    <language>nb</language>
          <item>
    <title>Einar Tho ny sjefredaktør i Haugesunds Avis</title>
    <link>http://journalisten.no/2015/04/einar-tho-ny-sjefredaktor-i-haugesunds-avis</link>
    <description>Vil forvalte avisens posisjon mer enn &amp;aring; revolusjonere.
</description>
     <pubDate>Wed, 15 Apr 2015 09:44:01 +0200</pubDate>
 <dc:creator>Glenn Slydal Johansen</dc:creator>
 <guid isPermaLink="true">http://journalisten.no/2015/04/einar-tho-ny-sjefredaktor-i-haugesunds-avis</guid>
  </item>
  <item>
    <title>Ingen NJ-krise</title>
    <link>http://journalisten.no/2015/04/ingen-nj-krise</link>
    <description>KOMMENTAR: Det er forst&amp;aring;elig at VG- og Aftenpostenklubbene er skuffet over valgene p&amp;aring; NJ-landsm&amp;oslash;tet, men valgene er ikke uttrykk for noen dyptgripende kulturkonflikt i NJ.
</description>
     <pubDate>Wed, 15 Apr 2015 07:02:11 +0200</pubDate>
 <dc:creator>Pål Hellesnes</dc:creator>
 <guid isPermaLink="true">http://journalisten.no/2015/04/ingen-nj-krise</guid>
  </item>
  <item>
    <title>TV taper reklamekroner</title>
    <link>http://journalisten.no/2015/04/tv-taper-reklamekroner</link>
    <description>Mediacoms TV-sjef forklarer nedgang med NRK og vintersuksesser som &amp;laquo;Anno&amp;raquo;.
</description>
     <pubDate>Tue, 14 Apr 2015 22:01:00 +0200</pubDate>
 <dc:creator>Glenn Slydal Johansen</dc:creator>
 <guid isPermaLink="true">http://journalisten.no/2015/04/tv-taper-reklamekroner</guid>
  </item>
[...CUT...]

I have other feeds served by the same situation, but this view seems to be the only one giving me troubles.
Any suggestions?

I have the same problem esolitos, i want to put some custom analytics with the & and the feed encoded is broken, It shows me & and that doesnt work for me, Did u solve this? . I see that in views rss code $value have decode_entities function but doesnt work, i keep watching this to find a solution.

Well, i fixed this with:

<?php
 function crvt_rss_url_helper_preprocess_views_view_views_rss(&$variables) {
  if (!empty($variables['rss_feed'])) {
    $variables['rss_feed'] = strtr($variables['rss_feed'], array(
      '&amp;' => '&',
    ));
  }
}
?>