FPlot.zip

I made a simple project to experiment with the features of Qwt, using Qt 5.0.1 and Qwt 6.1-rc3.
It builds ok but when you try to run the application, it crashes with a segmentation fault.
The offending line from the dissembler seems to be 0x61955ddb <+0x051b> mov (%eax),%edx

Can anyone please give me a clue as to what I am doing wrong here?
Thanks!