Above: One file, many temporary files. Illustrator goes a little insane.
The impact of this bug can be mildly annoying or very frustrating, depending on whether you’re uptight about keeping folders clean, as I am, and whether your backup strategy will suffer bloating as a result of saving possibly thousands of useless files. At a higher level, it’s indicative of Adobe Illustrator’s recent and increasing shakiness. I used to consider this program to be rock solid, and on the very few times that I ever crashed it, I found the incident almost laughable. I don’t feel quite that way any longer; I hit save frequently and fearfully.