Hello,
I realize that SUMA was crashing on OS X 10.5 when you open multiple viewers at once (ctrl+n), close one or a few of them, and then reopen them.
I think I have remedied the problem, so the functionality is still there and no crashes are occurring. It seems that Mac's recent GLX implementation is quite buggy - Valgrind reports numerous variable initialization problems - and I hope they'll get it fixed in future releases.
Should you find releases postdating this message to still crash, let me know.
cheers,
ziad