Imagine my surprise when I discovered that the default RSS feed generator in Mambo doesn't support HTML. Madness!
Anyway having upgraded to RSSXT
I now have lovely RSS feeds. I'm trying hard not think about the
chocolate-teapotishness of an RSS feed from a CMS not doing HTML.
On the subject of RSS feeds here are some things that annoy me:
Not setting PubDate.
Adverts (seriously, just don't.)
Advertising Last-Modified or ETag in your HTTP headers but not sending
back 304 when they are used as part of the page request. Yes Liberated Syndication, I'm looking at you.