Actually, in my case it is a result of setting the crystalReportViewer.Width and crystalReportViewer.Height.
In my app, I still do get the scroll bar, but it's about 90% the height of the viewer and does not scroll more than the 10% it has left over. In Firefox, it works fine. E.g.;
IE 11:
Firefox:
I'll see what R&D says.
- Ludek