I was updating this site today, and getting some pictures to match my beer, when I came across Ian Wienands Homebrew Page.
Ian seems to have started out like me – bought a Coopers Micro-Brewery last year, and gave a few things a bit of a go. Unfortunately, something went wrong.
This was an attempt at a Polar Beer, like mine here: Goldrush Polar Beer
Ian thinks it got infected because he was using a shower-tap attachment to fill it. My other suggestion is that using a fish tank heater may not be the most sanitary way of keeping a brew at the right temperature.