Analytics plugin bug
You may have noticed a recent issue with comment author links: they had '%20rel='external%20nofollow" appended to the end of the URL. Apparently this is an incompatibility bug with the Google Analytics plugin by Rich Boakes (v0.68) and the latest release of WP. I found a thread on the WP support forums detailing a fix which I'm happy to say works. Simply change the following line in googleanalytics.php:
function comment_author_link($text) {
static $anchorPattern = '(.*href\s*=\s*)[\"\']*(.*)[\"\'] (.*)';
To this:
function comment_author_link($text) {
static $anchorPattern = '(.*href\s*=\s*)[\"\']*(.*\?)[\"\'] (.*)';
Gotta love regexp. :)