Up until a few days ago my site's RSS was running fine. Then suddenly I get timeout messages from Feedburner. Here's the feed in question:
These error messages pop up when I try and run it:
error on line 15 at column 18: Unescaped '<' not allowed in attributes values
The URL does not appear to reference a valid XML file. We encountered the following problem: Error on line 14: The value of attribute "href" associated with an element type "null" must not contain the '<' character.
This appears to be the glitchy line:
<atom:link href="<?php self_link(); ?>" rel="self" type="application/rss+xml" />
If I take this out everything seems to run ok, but the feed is still slow returning. Why did this suddenly become a problem?