External links in comments broken

I’m not sure if this is known bug, but it looks like there is a problem in comment-template.php… Either that or there’s something I’m missing in my template.

When logged in, I see links in the comment section show up as:

<a href='http://blog.lemonpi.net' rel='external nofollow' class='url'>Y</a>

when not logged in, they show up as:

<a href="http://blog.lemonpi.net' rel='external nofollow" onclick="javascript:pageTracker._trackPageview ('/outbound/blog.lemonpi.net' rel='external nofollow');" class='url'>Y</a>

the problem here being the mismatch of single vs double quotes. The mismatch causes the browser to interpret the url as “http://blog.lemonpi.net’ rel=’external nofollow” which is obviously not a valid URL. Any idea what’s going on?