qTranslate filters the post titles/contents using a hidden html/shortcode tags:
<!--:en-->English Title<!--:--><!--:ar-->Arabic Title<!--:-->
Since WordPress SEO fills the SEO title unfiltered, the post gets an ugly and long (very long sometimes) SEO titles. Is it possible to make a workaround for this?
The ultimate solution would to assign the right title to every translation version (English title with pointing to the English URL, Arabic title with pointing to the Arabic translation URL, etc). The short solution would to always assign the default locale name with the default post URL.