WordPress is replacing double minus signs in Post Title, how to disable it?

yes I believe you can stop that by disabling the wptexturize function: 

<?php
remove_filter('the_content', 'wptexturize');
remove_filter('the_title', 'wptexturize');
?>

… for example. You can add that to you themes functions.php file.

http://codex.wordpress.org/Function_Reference/wptexturize

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