SimplePie 1.x

From old fora, reported by hcgtv:

1) Is your webhost compatible, as per the bundled SimplePie Compatibility Test?
Yes

2) Version and/or build number of SimplePie
define('SIMPLEPIE_VERSION', '1.1');
define('SIMPLEPIE_BUILD', 20080102221556);

3) Are you using a plugin? (e.g. WordPress, Textpattern, Mediawiki, etc.)
Textpattern Plugin 1.2.1

4) What version of PHP is this on? If you're using the demo on simplepie.org, it's PHP 5.2.2.
PHP 5.2.4

5) Your web server software (Apache, IIS, etc.)
Apache 2.2.6

My full specs: http://bertgarcia.com/specs/

6) The URL of the feed(s) you were testing.
http://analogdigital.org/

The above site was running 1.0.1 just fine, decided to upgrade to 1.1. The TxP plugin was updated to 1.2.1 when 1.0.1 came out, so I just copied over the 1.1 .inc file to the TxP system.

Cron job:
0,30 * * * * www-data wget -q -O /var/www/mysite/textpattern/tmp/feeds.html http://analogdigital.org

I went back to using 1.0.1 but I saved off the page so you can see the errors:
http://analogdigital.org/feeds.html

For the above test, I wiped out the cache files prior to the cron job running. At the top of the hour, it populated the page just fine, it was at the bottom of the hour, when the cache files already existed, that I got the error messages in my Apache error.log:

PHP Notice: A feed could not be found at http://bertgarcia.com/rss/ in /var/www/mysite/textpattern/lib/simplepie.inc on line 1666, referer: http://analogdigital.org/

What's really strange is that I have SimplePie running on 6 sites, only two sites are causing me problems, the other sites appear to be ok running on this server with the same versions of TxP and the plugin, go figure.