This firmware is only intended for folks running 0.8.x or later. If you're on 0.1.x, you'd have to download the ISO and re-install as this is a big jump from 0.1.x and there are way too many changes for a firmware update.
Folks on 0.8.x, please use this new startup script from now on. You don't really need to, but this new script is easier to recover errors from. To start using this new script, please SSH into your SnakeoilOS machine, and run the following commands:
sudo wget "https://git.snakeoil-os.net/snakeoil/snakeoil-rest/uploads/0ffde01fd096c24e409cf705263db62f/snakeoil-server.sh" -O /usr/local/bin/snakeoil-server.sh
sudo chmod 755 /usr/local/bin/snakeoil-server.sh
sudo reboot
WHATS NEW
For a list of things new since 0.1.5, refer to the 1.0.0 Changelog.
Refer to this ticket for fixes since beta (0.8.x).
Refer to this ticket for issues/fixes in Release Candidates (0.9.x)
DOWNLOAD


ADDENDUM
Depending on which version of 0.8.x, there may be issues when updating the firmware. Once the firmware is uploaded, go to another menu (e.g. Player), and then back to the "System" menu again and see if that works. If the firmware updates properly, you should see the following in the dashboard. Make sure it says 0.9.0. Please post in here if you have issues.