I just freshly installed Xubuntu 11.10 and installed Gnuradio with the build_gnuradio script with out any problems. When I use uhd_fft.py or any program that uses the FFT sink ( all other sinks work ) I get a very strange problem, as long as some part of the FFT plots line is hidden it will run with no problems, but a soon as I change a parameter which results in the showing of the entire blue line from start to finish it crashes with no errors ( just falls back to prompt quietly ). I can change the gain so the line comes up into view and when it does it crashes, I can also scale the plot down until the line is completely shown or scale up to the line or even just change to a frequency with a higher noise level, the result is the same, if the line is completely on the screen it crashes. I'm not sure where to start with this one, I don't know if it's in Wxgui or WX itself, or something with my system. How should I start finding the problem?