No, it's a problem with futexes. If your production code doesn't use many (any) threads, you should be fine.
People are reporting the same issue with MySQLd, I had it with Firefox.
Yeah this is what is slaying linkedin at the moment.
MySQL is also apparently affected, according to the #mysql IRC channel.
Yes, this happened on my development MySQL instance and also one of my production instances of MySQL -- but not another one that I have. I'm not sure why it only affected one, maybe different versions of MySQL?