I've used my BD Moonlight for a year now on Rainier in winter, in the pouring rain, after dropping in the stream, etc. I bought it after I decided my Petzl Zoom felt like a brick. The BD has never turned on accidentally in my pack. The LEDs dim gradually as the batteries age, giving you fair warning and time to get to a good place to change batteries. The light is bright enough for just about all climbing, including glacier travel. It is much more uniform than any halogen bulb and because of that it doesn't need to be so bright. The features of the ground are easily distinguished and are not confused with the light and shadow cast by the halogens. I'd buy another one any time.
The problems with shorting may possibly result from mistreatment. If you wad the thing into a very tight pocket or jam stuff on top of it, it could very well torque the wires and cause them to break. All I can say is mine hasn't shorted after use on a couple dozen climbs.