I also get random crashes in test10. Could this be a problem with queued gui updates? One likely bug is in gatom_vis(), which seems to misplace the sys_unqueuegui() call, but I think there is a more subtle problem somewhere else, too.
thomas had some problem with the gui of the flext attribute editor ... iirc there is a problem if the tcl/tk string is too long ... might be related to that ...
cheers ... tim