Tales of soaring software + device crashes, wrong or misleadinginformation presented, and user errors?

It would be useful to hear your tales of soaring software crashing and/or providing misleading or inaccurate information. Please be specific.

It would also be good to hear about cases of "user error" where you made a mistake in either setting up the device, misinterpreting the information displayed, or you found yourself confused or mislead by the way the information was presented. Of particular interest would be pitfalls that you stumbled upon in flight and how you resolved the difficulty.

I'd also like to hear about any cases of two devices running in parallel and presenting conflicting or diverging information (for example different indications of wind direction/speed or final glide arrival height).