Version: (using KDE 4.3.3) When I hover the mouse over a pie chart segment I do not get the pop up tooltip describing the content of the segment. This worked in the KDE3 version. Works for line graphs in KDE4.
This has been reported to KDChart support and issued as bug KDCH-539 in its issue tracker. We'll have to wait for them or fix it ourselves if we have the time and send the patch upstream.
This has been solved by latest version of kdchart