Tested with 0.48+devel r10300+convex-cover.cpp.diff on Mac OS X 10.5.8 (i386):
a) 640985-parts_network-test-4c.svg (comment #6) crash reproduced as described in the file
b) 640985-grouped-objects-1.svg (comment #7) crash reproduced as described in the file
c) 640985-635469-New document 1.2010_09_11_05_01_56.0-connectors-deleted.svg crash not reproduced
Tested with 0.48+devel r10300+ convex- cover.cpp. diff on Mac OS X 10.5.8 (i386):
a) 640985- parts_network- test-4c. svg (comment #6)
crash reproduced as described in the file
b) 640985- grouped- objects- 1.svg (comment #7)
crash reproduced as described in the file
c) 640985-635469-New document 1.2010_ 09_11_05_ 01_56.0- connectors- deleted. svg
crash not reproduced