I had a similar problem with bloglines, or at least I first noticed it after an upgrade to WordPress 2.0.2. After the upgrade from 1.5.2 to 2.0.2, a newly published post a day or two later did not show up on a bloglines feed that has a few subscribers. This was unacceptable, and I didn’t have time to try to track it down. I got out the backups of the 1.5 dbase and the blog files, and rolled back the installation.
After the rollback to 1.5.2 is when I first noticed the feedvalidator.org CDATA warning, “Avoid content:encoded”, which may be similar to your “bloglines” issue. It may present in WordPress 2.0.2, but I didn’t specifically check it before deciding to rollback.
Feedvalidator.org says it’s a warning only, not an error. The warning in 1.5.2 can be eliminated by changing the RSS feed in Options > Reading > Syndication Feeds to “Summary” only instead of “Full Text”.
However, existence of the warning and keeping the “Full Text” option on the Syndication Feed doesn’t prevent bloglines from carrying my feed and my most recent post in my 1.5.2 rollback; the failure to carry it with 2.0.2 could have been a temporary glitch on blogline’s end that caused my single 2.0.2 post to not show: if so, it’s a coincidence and not causation.
This means there are two separate issues I was dealing with at the same time. It might be something that others here using 2.0.2 might want to check at bloglines (for the appearance of 2.0.2 posts) and the separate issue of feedvalidator.org’s “Avoid content:encoded” warning.
There are two old Trac entries regarding the content:encoded or CDATA issue, and I remarked off the str_replace(']]>', ']]>', $content); in what is, in 1.5.2, four separate include directory files, but it seemed to have no effect on the feed validator warning.
