On Monday I drew your attention to the RSS feed validator.  The OPML validator is another tool you’ll need if you do any OPML feed creation.
Using either validator is quite easy.  You simply input the url of your OPML feed and the feed validator will tell you where your errors are.  Of course, it’s still [...]

Unless you are using a professional blog platform, you will have RSS feed issues from time to time.  It’s important to assess the health of your feed often.
Schedule time, every month, to validate your feed.  It’s important because you don’t want any minor glitch interfering with your subscribers’ ability to get updates to your feed, [...]

From Digg:
The Photocasting feature of Apple’s new iPhoto application violates numerous internet standards, dignitaries from the RSS community have pointed out. "It ignores 95% of RSS and Atom and gets most of the remaining 5% wrong," one developer stated.
It’s been a bad week for Apple in the blogosphere. This time their issue is RSS-related.
"Photocasting [...]