Anybody using a 3rd party strobe with their G85? I'm a relatively new G85 owner, but I just realized that the hot shoe does not seem to be working. I don't have a Lumix strobe, but I've tried it with a new TTL Neewer NW320, as well as a trusty old Sunpak. Both strobes work on my GH-1. I've checked and rechecked the camera settings and even did a factory reset, but no luck. I also made sure the shutter was set to mechanical. The on-camera strobe works fine.