This feed does not validate.
... /jigsaw-planet-logo2.gif</url><width>272</width><height>48</height></ima ...
^
In addition, interoperability with the widest range of feed readers could be improved by implementing the following recommendations.
... /description><image><title>Jigsaw Planet</title><link>https://www.jigsaw ...
^
... title><link>https://www.jigsawplanet.com</link><url>https://www.jigsawpl ...
^
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>checktulip8</title><link>https://www.jigsawplanet.com/checktulip8</link><description></description><image><title>Jigsaw Planet</title><link>https://www.jigsawplanet.com</link><url>https://www.jigsawplanet.com/img/jigsaw-planet-logo2.gif</url><width>272</width><height>48</height></image><atom:link rel="self" href="https://www.jigsawplanet.com/checktulip8?rc=userrss" type="application/rss+xml"/></channel></rss>