problem with lightbox plugin

Hi, after upgrade WP my lightbox plugin stops working.
I found some clues about the problem.
On the wp-lightbox2.php file there is one function above:

function wp_lightbox2_replace($string) {
$pattern = '/(<a><img)/ie';
$replacement = '(strstr("25","rel=") ? "1" : "</a><a><img")';
return preg_replace($pattern, $replacement, $string);
}"

It seems that this function looks for the string href=” and img on the page and put the code rel=”lightbox” on it.

But on WP 2.1 the when i looked at the page code, i found links like: <img src=’http:/….>
As far as i understood the functon looks for <img src=”https://&#8230;..>
So the plugin looks for ” and wp 2.1 uses links with ‘
Can anyone give me a help tho solve this issue?