If I define a virtual data point with a sinusoidal change, the dialog requires that I enter a value for phase shift. If I define a phase shift and save the settings for that data point, the next time I open that dialog the phase shift is gone, and I have to enter it again before the save button works.
Also, while entering a value for phase shift does appear to have the desired effect, it does not persist across Mango lifecycles - when Mango shuts down and is subsequently restarted, the phase shift is no longer apparent.
Edit: Possibly related problem
If I define a multistate virtual data point, there is a field in which the values and start value can be defined.
After doing so, if I open that dialog again, the values and start value are not shown.