Was lucky not to drop the camera used yesterday, as one of the strap mounting lugs detached. There must be a couple of small screws loose somewhere inside. Internet research reveals this is a common problem with this camera (E-M1), and some other Olympus models. Even though it was a cheap secondhand purchase, I'm hoping the supplier can fix it, or get Olympus to, as I suspect it will require a significant strip-down to sort it. Threadlock type adhesive should have been deployed.