Lightbox Plus version 1.6.8 has been released. It fixes several issue such as the double
rel=lightbox tag that was being generated. I also fixed some issues with the style sheets especially the back end style sheet for the admin panel and the IE 6 specific style sheets in some of the themes.
The main new feature that I added was the ability to auto-lightbox links to images that did not have an image in the link (i.e. text links to images.) I also added additional control over the width and height of images which can allow for interesting display options and different handling for long text.
Lightbox Plus now also works with WordPress MU. It has been tested with version 2.9.2 of WordPress MU and works quite well. It can be enabled globally or individually.
Full list of changes below.