Gave it a quick play around. Crashes with seg fault trying to load a ROM with the GUI. Also of note is that all the conf files created in /home/user/.mupen64plus are owned by root... making it difficult to modify manually. Blight input configuration in the GUI now works flawlessy, however. Tried execution with mupen64plus <romname>, it crashed and now my GUI reverts back to the black GUI as well, not sure whats going on :P