[REGARDED AS SOLVED] RSS [2.10]; r112480 output is distorted containing (table border cellpadding cellspacing ...)
Fragment of a discussion from Extension talk:RSS
Maybe in this case you might want to look at Sanitizer::removeHTMLtags which cleans up HTML, removes dangerous tags and attributes.
- filed as Bug 34763 "RSS feed items (HTML) are not rendered as HTML but htmlescaped. Should be rendered as addHTML(Sanitizer::removeHTMLtags(feed-item-description))" --Wikinaut (talk) 22:33, 27 February 2012 (UTC)