I've just released version 1.5.1 of phpFlickr. This implements the new flickr.photos.comments.getList method. You can finally display your photos' comments on your site, if you so desire. The function name is, of course, photos_comments_getList().
I've just transferred phpFlickr.com to a new server. This is a dedicated server and should prove to be much more stable than the hosted virtual server I was using.
There is a bug in photos_licenses.setLicense() (thanks, Christian!). Line 1034 in phpFlickr.php should read:
$this->request("flickr.photos.licenses.setLicense", array("photo_id"=>$photo_id, "license_id"=>$license_id), TRUE);
The problem was with capitalization of $photo_id. If you've been having problems setting licenses, this would be why. I've updated CVS and the fix will be in the next release.