I don't have the answer, but when the trend goes to zero, I'll be suspicious about the distro's community, it could be a bug free distribution you're right. On

I don't have the answer, but when the trend goes to zero, I'll be suspicious about the distro's community, it could be a bug free distribution you're right. On the other side, as a Arch Linux user, I don't think this distro is more buggy that before, and the trend goes clearly up. But you're right, their is not only one reason for the trend's explanation.