I downloaded your latest (1.2.1), compiled and tried to run examples in VS 2010, Qt5.2.1. Running the interaction-example, the program runs fine, but when I quit by clicking the close button in upper right, I get exception errors, looks like they come from destructors of QCPGrid, and QCPLayerable. I get the same exceptions on close for a short program I am writing using QCustomPlot. The chart-examples has similar behavior, it runs fine, but on close I get exceptions, in this case coming from QCPGraph destructor.
Anyone know the root cause?