I had a similar experience with garbage collection. I would set the the collection on timer, then later find out that it was being reset back to clock. The problem seems to have gone away after I deleted the sample configuration file that comes with the installation. The code uses this file if no configuration exists. Since I deleted the sample, I have not had a occurrence of the problem. Just another factor to consider when debugging.
I am seeing the same thing on version 2.2.2
PHP Fatal error: Too many values for format string: => 1219148145 in /home/…/wp-content/plugins/openid/store.php on line 441
php 4.4.8, Linux 2.6.9-67.0.15.ELsmp, Apache 1.3.41
