Great stuff. Not sure, but this version didn't crash on me even once and got to lev4 (on autoexplore, maybe this is why), going to test it out right now and let you know of the results.
EDIT: strange, your version does indeed seem to segfault a lot (4 out of 5 times when running, or was unlucky), my compilation seems to get started 10 out of 10. Can't get it to segfault. Will try to compile your source and see if that helps (gcc 4.4 is only difference as this was tested on pre-CSSU phone)
Yup, it works everytime (just requires 'save' directory) and doesn't segfault even on changing levels, attached. It is stripped yet 100kb bigger, not sure if 4.4 is the only difference...