Little problem with the Module Manager/ 1.3.3

[Isura]

I got a little problem with the sitebar modules. I added two links with the following php-code:

PHP Code:

$moduleContainer->add(new Comment("<a href=/languages/de>Deutsch</a> <a href=/languages/eng>English</a>")); 


Both links show up and work so far, until I opend the site in a new browser window. Then instead of treeofarvalus.de/languages/eng it opens treeofarvalus.de/languages.php/eng and shows the index.
I'm not sure if this is really an error with the script or with my browser settings. But I would really thankful if someone could find a solution or could tell me if he gets the same error.

Reproduce the error:
1. Go to www.treeofarvalus.de
2. click the link 'English' in the sidebar
3. it open /languages.php/eng instead of /languages/eng
If you click it again, it'll lead you to the right site.