If this bug would cause you any significant damages whatsoever, you're doing it wrong. Hard disks fail all the time. This bug is quite analogous to a harddisk f

If this bug would cause you any significant damages whatsoever, you're doing it wrong. Hard disks fail all the time. This bug is quite analogous to a harddisk failing. Backup everything that matters. Even if you did somehow manage to lose enough money that the damages could bankrupt Valve (or even pay for your lawyer), I doubt you would win. Basically all software these days disclaims all warranties. This wasn't malicious or particularly out of the ordinary for this industry.