I've been entirely too profligate in changing permalinks in the past, and now I'm trying to clean up my act, but I have an unexpected problem--I've broken all my external links and my ability to HAVE external links to some files. I changed my permalink structure from year/month/postname to /postname/ then installed the redirection plugin and then saw thousands of attempted redirections that were yielding 404's. I read in the Yoast blog that redirection would automatically fix that but assumed I had the order of execution wrong, so I turned off the plugin, switched back to /year/month/postname/ then turned the plugin on and switched to /postname/. Worked, sort of, but all my external links--mostly pictures like wpcontent/uploads/2011/11/sam.png were broken--and are being treated like permalinked posts. I can see why that might be, but I can't fix it. Pushing the panic button on the plugin (delete all redirection and deactivate the plugin) did NOT solve the problem. I could use some help with this. I'm also using bulletproof security with fiddles with the .htaccess files a lot. I'm no expert on .htaccess and regular expressiions look like Klingon to me.