WordPress version: 3.4.2
WordPress SEO version: 18.104.22.168
In general it works, but for some content there's hexadecimal content before the sitemap XML and in the end. This makes the xml invalid to google webmasters tools.
Yes, I tried to deactivate all plugins, and yes, I tried changing the theme.
Made some tests and unpublishing 3 posts ( http://www.babysec.cl/2012/11/nuevo-comercial-babysec-voy-solito/ , http://www.babysec.cl/2012/10/nuevo-comercial-babysec-guaguas-de-hoy/ and http://www.babysec.cl/2012/11/nuevo-comercial-babysec-teleton-2012/ ) makes the xml file OK. Maybe there's something unfiltered with the encodings (it's a spanish site)
If I change the slugs of any of these posts, the hex number changes but it doesn't dissapear.
http://cl.ly/image/1I2i3V2y1W3c the beginning of the file (notice the "1f52")
http://cl.ly/image/0L3q3E0K1n3B the ending of the file (notice both "36" and "0")
Thanks in advance.