The first chosen-prefix collision for SHA-1
This kind of thing always brings me down a bit. It's not rational, but it does.I mean I truly admire these folks skills, the math involved is obviously remarkable.But I think the feeling is related to not being able to rely on anything in our field. Hard to justify going to the trouble of encrypting your backup. 10 years from now, it might be as good as plain text.It's not security only, nothing seems to work in the long term. 
Imagine an engineer receiving a call at midnight about his bridge because gravity changed during daylight saving in a leap year. That's our field.