I've just tried upgrading from 10.6.4 and have been told by Software Update "Your hard disk does not have enough space. You need 6.66 GB of available space to download and install the updates. To increase available space, remove files from your startup disk, and then try again." I deliberately partitioned my drive to keep my OS separate from everything else and make fresh installs easier. Am I the only one who thinks this is getting ridiculous? I mean, 6.66GB to perform a two-step update. I know how to go about freeing up disk space, but there's no way I'm going to find an extra 3.66GB without trashing essential files... so what options does that leave me with?