Finder arithmetic problem...? I noticed my total HD use seemed to have jumped significantly in the last couple of weeks when I started a backup of the drive in Time Machine. At first I was just amazed I had somehow gotten to fill 300G of drive space, but then I realized that was not likely, and started counting folder sizes. Turns out I hadn't - there is something wrong. Please bust out a calculator if you need to (I did) and tally up the above folder sizes, relative to the total for the HD. Disk total for HD Walty given by Finder as 308Gb, while the totals for the folders in Walty are 203Gb. What is up with the extra 100Gb of "dark matter" on my drive? Finder includes Desktop and Trash files in the user directory space, of course. And I just emptied the trash in both user accounts. My first instinct was to run DiskWarrior from the DVD and rebuild the directory, it ran fine, it didn't help with the faulty arithmetic. I have also deleted some caches via Onyx (yay onyx!). No effect on this. Note: the tally is wrong with or without the external LaCie HD attached; I can provide another screenshot if you need to see. What in the world?! There don't seem to be any threads on this here or at Apple discussions.