Looks like I'm a perfect missionary,
converted another soul to opera. Yay. But of course, that browser isn't perfect either. It's just software after all. And in this case, it is written in C++ and with Visual Studio, as I just 'discovered':

Yep, they can be tricky, those pure virtual methods. You really don't expect an objects vtable to change when it is destructed. Or who knows how they managed to create that bug.