Ah, "cat.jpg". 100 millionth file name, you can see the post where that nugget was let out, and the followup apology from DHH on the svn blog still. Thing is,

Ah, "cat.jpg". 100 millionth file name, you can see the post where that nugget was let out, and the followup apology from DHH on the svn blog still. Thing is, Taylor, the head of Ops who made the fateful blog post made it up as a joke. He didn't check, or look it up, he wouldn't have done. The chance of it being called "cat.jpg" is slim. It was literally a joke based on the number of cat pictures that people uploaded to the Internet. DHH proof-read the post. People complained that we were prying into customer data (we weren't, and Basecamp's customer data privacy and security policies are incredibly strong), but DHH wouldn't let us "come clean" believing that people would think we were covering it up, so he apologised for it as if it were real. Source: Worked at basecamp at the time.