Rattlesnaking still a problem?

Yup, it's still happening. I've only noticed it with my PL25 + E-M5, not with my P14. Be aware that it happens only in bright light.

One thing I've found to mitigate it is to turn the camera on with the lens cap on, then take the cap off to shoot. The rattling is almost guaranteed to occur if you turn the camera on without the lens cap, in bright light. Of course this may not always be an option depending on your circumstances and shooting style.