General Support: Need help with sanitize_filename function.

Hi, note: (space added in front of break tags so they would show up in this post i.e. < br />)

I am trying to strip out the < br /> tags which are showing up in with just the 'br' in the url, all the other parts get stripped during the preg_replace() operation. The problem is my way of doing this does not work correctly, although it strips out the < br> and < br /> correctly, now when I click on the thumbnail, the link no longer works properly:

This is what I have for sanitize_filename

function sanitize_filename($str) {
$str = str_replace("< br>", "",$str);
$str = str_replace("< br />", "_", $str);
$str = preg_replace(array("/['|\"]/", "/[^\w|\.|\-|\[|\]]/"), array("", "-"), $str);
return $str;
}