Just uploaded ShadowBox v1.5.5 to wordpress.org. Main change in this release is a fix to the author page pagination that @markhamasylum noticed. Might be a couple of days before its available for download.
Getting close to finishing Translucence, a new theme modeled on ShadowBox but completely rewritten using the new WordPress default theme TwentyTen template files. If you like ShadowBox, I think you’ll really like Translucence.