I've just released qcontrol 0.5.2. Changes since the last release:

• Fix memory corruption bug (Debian bug #708376).
• Ignore code 0x43 from PIC, avoid spamming log.
• Implement hysteresis for fan speed (Arno via Debian bug #709095).
• Support for systemd socket activation and added systemd service files (both from Michael Stapelberg).

Get it from gitorious or http://www.hellion.org.uk/qcontrol/releases/0.5.2/.

The Debian package will be uploaded shortly.