When I installed the plugin on a new blogs server, it got caught in an rewrite loop that caused the server’s error logs to balloon. I reinstalled the plugin into the folder /embed-rss (i.e. the name of the extant folder in the plugin.) It broke. I did another reinstall of the plugin, this time into a folder called /cets_EmbedRSS (i.e. following the directions of the readme.) Still broken.
I love this plugin! I still use it on my blogs running WP 2.8.2. What can I do to fix it?