Portfolio categories and qtranslate

Hello. First congrat. for this theme. I really like it.
I’m using qtranslate and everything works fine except the portfolio categories. The qtranslate quicktags ([:en] )doesn’t work. I’ve also tried the tags () but it doesn’t work either…

Any idea? You can see it here: http://yleon.hatandcatdesign.com/portfolio_category/edificios-singulares/
Thanks in advance.
L.