I installed the update on all my systems (Firefox & IE), partially with manual uninstall / install, and partially via auto-update, and no problems at all.
Note that you need to click the checkbox next to 'I have read and agree...' before you can click the INSTALL button (the color scheme here is really terrible!).
Thanks Hazelnut, I've been looking for that flashinstaller link sooo much easier when I'm dealing with computers other people are logged into RunAs ftw