I do not have the battery drain problem. But while using the camera in Bali over the weekend the lens protective shutter was stuck and could not close properly! Tried on/off power many times and no effect. When switched on, the shutter could not open fully resulting in partially blocked pictures.
Had to manually push up the shutter with a paper tissue (to avoid fingerprint on lens). Fortunately, 3 hours of shooting later (and multiple times manipulating the shutter), the shutter managed to close fully, and has remained fully functional for the last 24 hours.
Hope it stays this way!