Not sure if the problem appeared after the recent upgrade, I think it did.
In reports, the date range picker does not allow selection prior to current month (November '15). If I edit manually the URL and set the dates I need directly in address bar, the report still shows up with dates starting from November 1st.
Note that all widgets on all dashboards do show data for the recent 30 days, and there is data in archive tables. I also tried reprocessing reports.
What is the problem and how can it be fixed?