Have I read the related troubleshooter articles above before posting (which pages?)? No - none were relevant by their description
Have I searched the forum before posting? yes
Have I read the documentation before posting (which pages?)? yes
Joomla! version: 1.5.23
PHP version: 5.2.17
MySQL version: 5.1.58-community-log
Host: (optional, but it helps us help you)
Admin Tools version: 2.1.5
Description of my issue: I discovered today that a videoplayer that was working fine for over a year on this page is not loading the playlist. I first checked to see that I had the most recent versions of the component and plugin and verified that the parameters were set properly.
Then I noticed that the "last played" date in that playlist was just before I installed Admin tools.