Well, the memory leak has been found and fixed. It's QPainter::drawPolygon! I am now using a for loop with QPainter:drawLine instead. I am baffled, once more.

I am now fixing gobreadcrumbs, then the internet confirmation, then whatmore... A lot to do and very little time to do it! Anyway, by the end of may Alpha 2 will be out. The official 2.0 will not be out before summer, i fear, but at least nto much more than help will be missing i hope!