Well, looking around the last few days, this SHA-1 collision is breaking various pieces of software (svn in particular). You can't count on two documents with the same hash being the same document.
Sure, there is broken, and then even-more broken, but SHA-1 is already, for most practical purposes, useless.
Sure, if the claims stopped at SHA-1 being "useless" then I have no complaints. But generally the headless chicken dance tends to quickly move on to all kinds of practical exploitability; which simply isn't true.
Sure, there is broken, and then even-more broken, but SHA-1 is already, for most practical purposes, useless.