I think I've found another bug: first create an olap analysis in the demo system for instance for the sales cube and drag profit in measures, the time hierarchy in rows and promotion media in columns, then create a simple line chart and in the chart options switch the chart axis. When you now try to click on "All media" on the chart's legend you'd expect to see several lines in the chart representing the different promotion media still on year's level in the time dimension. Unfortunately, the table and the chart do not drill down the promotion media dimension, but instead the time hierarchy and show the quarters for all media.