Image_Graph and memory leaks

Image_Graph is a very promising package, though still alpha. I tested it and found out it has several memory leaks, one of which is a big stopper : GD Image object isn't destroyed, which leads to some 8MB memory per image that can never be freed (on the testing system). Adding ImageDestroy($this->_canvas); in Graph/Driver/GD/PNG.php will deal with that (probably not the best place to add it but since I'm only using png I went straight there). Unfortunately there's another 300KB memory leak, which I wasn't able to track down. Since the allocated memory is never freed, using Image_Graph for massive diagram generation is nearly impossible. Hints welcome if anyone had some success tracking this one or some clue as to where to look for that -hopefully- last leak. Regards, Brice Joly PS:I'm not sure bugs for alpha packages should be reported here, please point me to the right place if this isn't.