I'm amused by the whining as well. I've been using Retrospect successfully for almost a year and a half to manage backups of OSX desktops, Xserves, Windows, and Red Hat servers. I'm not saying its the best tool for the job, but it gets the job done.
This driver update isn't mission critical to my workflow, so I didn't apply it.
Retrospect 6 Driver Update
backup driver
Version: 6.1.15.101