strpos() error in WP 3.9

This might help some devs out there who also make or edit themes. If you’re getting the strpos() error when you upgraded to WP 3.9 and your theme options has something like this:
add_filter(‘option_mythemeoption’, ‘do_shortcode’);

This is 1 of the possible causes of error in WP 3.9 but the error thrown is for strpos(). Im not sure why.

If you have disabled all plugins and fixed other strpos() errors, this might be it. Comment it out or delete it. If you know other solutions, please let me know.

Thanks