I wonder if any users are having a problem similar to mine: whenever I publish a post or comment I receive a 500 internal server error. The post & comment always publishes.
I've also noticed incredibly sluggish page serving after publishing anything taking as long as 20-25 seconds sometimes.
When I deactivate the plugin the problem (at least so far) goes away. This just started after the most recent plugin upgrade.
My tech support person tells me YARPP is throwing errors on my logs as well.