I'd like to look into this issue, but I can not reproduce the problem on WP 3.5.2, WP SEO 1.4.13 with theme: twentytwelve.
The more info I get, the better chance there is that I can solve it.
So for those willing to help get this fixed, please give me as much information as you can for the following questions:
- What theme are you using when the problem occurs ?
- Does it still occur using one of the WP default themes ? (some say it does, some say it doesn't)
- Does it still occur if all other plugins are deactivated ?
- What - if any - PHP error messages do you see in your error log ? or on the screen/in the page source if you have WP_DEBUG enabled ?
Please only post errors which relate to WP SEO!
If you are currently not logging PHP errors, have a look at this code which you can add to your wp-config.php file.
It will log any and all php errors to a file, independently of whether you have WP_DEBUG set to true. That way you can keep track of PHP issues on a live website.
I'd be very interested to hear if any errors relating to this issue show up in the log.
Be aware: logging errors will generally scare the living daylights out of most people as they suddenly start realising how many plugins are throwing errors....
Look forward to hearing more.