WordPress version: 3.5.1
WordPress SEO version: 1.4.2 (also tried development version)
Updated to 1.4.2 and the Portolio post type in the Genesis Minimum child theme broke. /portfolio/ or /portfolio/post/ return 404 error pages. I tried a clean install to test. 1.4.2 + Genesis Minimum works. Add the Event Manager plugin and it breaks. 1.4.1 + Genesis Minimum + Events Manager does work though.
Update: Hm, I think you can ignore the info about Events Manager. Tried a fresh test site and it seems to have broken before I ever installed Events Manager. I also notice as others have posted the message "The plugin generated 295 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin." as others have posted. Deactivating and reactivating WordPress SEO 1.4.2 actually does seem to allow access to /portfolio/ though.