Some days I wish I was not a programmer.

MyFeed = XmlNew();
MyFeed.xmlRoot = XmlElemNew(MyFeed, "rss");
MyFeed.rss.XmlAttributes.version = "2.0";

In ColdFusion, this creates the XML tag:

<rss VERSION="2.0">

Which invalidates the RSS feed, because attributes must be declared in lowercase.

...
MyFeed.rss.XmlAttributes["version"] = "2.0";

Works, of course, creating the XML tag:

<rss version="2.0">

Hmph. The things you waste 15 minutes on and then blog about (wasting 15 more).