SEF in Joomla 2.5 no work with one word
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I work in component to show courses and need create routers, but I get some problems with register when contains one word.

One word not works see: http://www.joomlapro.com.br/new/pt_br/template/php-5-4-new-features/welcome

The project stay here https://github.com/joomlapro/com_courses

Without advanced_url works.

Anybody know how fix it?