QwtPolar 1.0.1 is a pure maintenance release collecting fixes for all known bugs so far:

1. MSVC compiler issues
2. Install path for the designer
3. Missing signal/slot connections of legendItemClicked/legendItemChecked
4. Memory leaks
5. Usage of QwtCurveFitter
6. QwtPolarPicker normalization of the displayed tracker position
7. QwtPolarCanvas::invTransform

The code is available from the QwtPolar project page.