In our solution, we have "From" and "To" calendar date-pickers in order to choose the date interval it is intended to analyse.
Each date-picker is associated with one date variable and its minimum and maximum values are also given by variables.
We had this working since about an year ago but recently we upgraded from 11.0 SR1 to 11.2 SR8 and we noticed a strange behaviour: in fact, although everything works fine when working in the server, when one uses the dashboard in our web platform, both date-pickers do not work.
For example: the available dates are the latest 30 days. If one selects From (day in October 2014) ans To (day in October 2014), it works fine. However, if one selects a day in November 2014 in either of the date-pickers, the result may be returning only a point (where we should have a line) or simply getting data from an interval that is not the desired.
So, presently I have online dashboards that have 'out of order' date-pickers and I have not a clue about how can I correct that. I would appreciate your help in order to solve this problem.