I run a high-traffic blog, and until this week I had no idea why I was getting tons of database errors and sitewide slow down of my blog. I was using YARPP version 3.0 plugin with W3 Total Cache which caused my blog to hang and crash whenever I edited a post. My visitors frequently complained about the slow loading time of the blog. I blamed my host, who blamed wordpress. I updated to the latest wordpress installation and I installed the latest YARPP plugin (3.5.1), but the problems only got worse. My blog crashed while I was attempting to post, and I received fatal Db errors. I couldn't even get into my blog to disable the YARPP plugin, so I deleted it from the server using the ftp. Right away my blog returned to normal and I was able to post again. The YARPP plugin is not recommended for high-traffic blogs. I appreciate mitcho for his hard work on the plugin, but he should be more forthcoming about the critical database errors with larger websites.