Multisite parsing html badly

Hello! I have installed a wp 3.3.1 multisite with subdomains in http://lasindias.com. Everything seems to work but…

… img and a tags doesnt seem to be correctly parsed by wordpress.

Ie, I write (and so is saved in the post):

Vamos a ver si aquí funcionan los <a href="http://deugarte.com">enlaces</a> y las imágenes:
<img src="http://deugarte.lasindias.com/files/2012/01/feliz-2012.jpg" alt="feliz 2012" />

But what appears in the code of the post after be parsed by wp is:

Vamos a ver si aquí funcionan los <a deugarte.com"="" http:="" href="<a href=">http://deugarte.com</a>“>enlaces y las imágenes:<br/>
<img feliz-2012.jpg"="" 01="" 2012="" files="" deugarte.lasindias.com="" http:="" src="<a href="/>http://deugarte.lasindias.com/files/2012/01/feliz-2012.jpg” alt=”feliz 2012″ />

Could someone help me? I have no active plugin, I have even reinstalled wp… but…