Didn’t miss it, don’t see the relevance. Instead of “tinfoil hatting” like so many, I downloaded ClassicLFG and searched through the source code. It calls SendWho in order to get the information on a person when a WHISPER is received. It’s not a hugely critical piece of functionality for the AddOn, so I’m guessing that it’s not due to this specific addon. But again, this is all speculation that could be easily resolved by Blizzard actually providing patch notes associated with this “hotfix”