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    Both files use <{php}> to insert some dynamic values, but when the files will be outputted with smarty they contain a bug.
Orginal code for both files is:
 echo "stylesheet" type="text/css" media="all" href="language/$language/style.css" />";  
Unfortunately the backslashes before the quotes will be removed by the textsanitizer for above code.
This will be outputted as:
 echo "stylesheet" type="text/css" media="all" href="language/$language/style.css" />";  
Correct code should go like this:
 echo '.$language.'/style.css" />';