Looks like a librsvg or libxml bug, debug backtrace for the crash:
#0 0xb7524984 in _int_malloc () from /lib/tls/i686/cmov/libc.so.6
(gdb) bt
#0 0xb7524984 in _int_malloc () from /lib/tls/i686/cmov/libc.so.6
#1 0xb75265ee in malloc () from /lib/tls/i686/cmov/libc.so.6
#2 0xb73c7b46 in xmlStrndup__internal_alias (
cur=0x85c5db2 "48pt\"\n height=\"48pt\"\n id=\"svg1\"\n sodipodi:version=\"0.32pre\"\n sodipodi:docname=\"/home/cschalle/spherecrystal/SphereCrystal/icons/scalable/mimetypes/gnome-mime-video.svg\"\n sodipodi:docbase=\"/h"...,
len=4) at xmlstring.c:45
#3 0xb736337b in xmlParseAttValueInternal (ctxt=0x850aac8, len=0x0, alloc=0x0, normalize=0) at parser.c:7719
#4 0xb73647bf in xmlParseAttribute__internal_alias (ctxt=0x850aac8, value=0xbfa30128) at parser.c:7053
#5 0xb7364a2a in xmlParseStartTag__internal_alias (ctxt=0x850aac8) at parser.c:7155
#6 0xb736cb2e in xmlParseChunk__internal_alias (ctxt=0x850aac8,
chunk=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n<!-- Created with Sodipodi (\"http"...,
size=15349, terminate=0) at parser.c:9858
#7 0xb637cac6 in rsvg_handle_write_impl (handle=0x82c4ca0,
buf=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n<!-- Created with Sodipodi (\"http"...,
count=15349, error=0x8429ce4) at rsvg-base.c:1020
#8 0xb6399b80 in gdk_pixbuf__svg_image_load_increment (data=0x84e9ca0,
buf=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n<!-- Created with Sodipodi (\"http"...,
size=15349, error=0x8429ce4) at io-svg.c:129
#9 0xb7942f56 in IA__gdk_pixbuf_loader_write (loader=0x845b5a0,
buf=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n<!-- Created with Sodipodi (\"http"...,
count=15349, error=0x8429ce4) at gdk-pixbuf-loader.c:466
#10 0xb7afdbb5 in icon_info_ensure_scale_and_pixbuf (icon_info=0x8429cc0, scale_only=<value optimized out>)
at gtkicontheme.c:2547
#11 0xb7afdf5d in IA__gtk_icon_info_load_icon (icon_info=0x8429cc0, error=0x0) at gtkicontheme.c:2714
#12 0xb7afff0e in IA__gtk_icon_theme_load_icon (icon_theme=0x8158f10, icon_name=0x82e02b0 "gnome-mime-video", size=16,
flags=0, error=0x0) at gtkicontheme.c:1394
#13 0xb7b870e4 in get_cached_icon (name=0x82e02b0 "gnome-mime-video", pixel_size=16) at gtkrecentmanager.c:1981
#14 0xb7b89455 in IA__gtk_recent_info_get_icon (info=0x84a82a0, size=16) at gtkrecentmanager.c:2012
#15 0xb7b827b7 in idle_populate_func (data=0x8225a70) at gtkrecentchoosermenu.c:955
#16 0xb7736ee1 in g_idle_dispatch (source=0x84c8a00, callback=0x8408590, user_data=0x8225a70) at gmain.c:3928
#17 0xb7738c42 in IA__g_main_context_dispatch (context=0x80ecd80) at gmain.c:2045
#18 0xb773bc1f in g_main_context_iterate (context=0x80ecd80, block=1, dispatch=1, self=0x80c3180) at gmain.c:2677
#19 0xb773bfc9 in IA__g_main_loop_run (loop=0x823e0b0) at gmain.c:2881
#20 0xb7b2ff84 in IA__gtk_main () at gtkmain.c:1171
#21 0x0806384c in main ()
Looks like a librsvg or libxml bug, debug backtrace for the crash:
#0 0xb7524984 in _int_malloc () from /lib/tls/ i686/cmov/ libc.so. 6 i686/cmov/ libc.so. 6 i686/cmov/ libc.so. 6 _internal_ alias ( version= \"0.32pre\ "\n sodipodi: docname= \"/home/ cschalle/ spherecrystal/ SphereCrystal/ icons/scalable/ mimetypes/ gnome-mime- video.svg\ "\n sodipodi: docbase= \"/h".. ., eInternal (ctxt=0x850aac8, len=0x0, alloc=0x0, normalize=0) at parser.c:7719 te__internal_ alias (ctxt=0x850aac8, value=0xbfa30128) at parser.c:7053 g__internal_ alias (ctxt=0x850aac8) at parser.c:7155 _internal_ alias (ctxt=0x850aac8, \"no\"? >\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http:// www.w3. org/TR/ 2001/REC- SVG-20010904/ DTD/svg10. dtd\">\n<!-- Created with Sodipodi (\"http"..., write_impl (handle=0x82c4ca0, \"no\"? >\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http:// www.w3. org/TR/ 2001/REC- SVG-20010904/ DTD/svg10. dtd\">\n<!-- Created with Sodipodi (\"http"..., _svg_image_ load_increment (data=0x84e9ca0, \"no\"? >\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http:// www.w3. org/TR/ 2001/REC- SVG-20010904/ DTD/svg10. dtd\">\n<!-- Created with Sodipodi (\"http"..., pixbuf_ loader_ write (loader=0x845b5a0, \"no\"? >\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n\"http:// www.w3. org/TR/ 2001/REC- SVG-20010904/ DTD/svg10. dtd\">\n<!-- Created with Sodipodi (\"http"..., loader. c:466 ensure_ scale_and_ pixbuf (icon_info= 0x8429cc0, scale_only=<value optimized out>) icon_info_ load_icon (icon_info= 0x8429cc0, error=0x0) at gtkicontheme.c:2714 icon_theme_ load_icon (icon_theme= 0x8158f10, icon_name=0x82e02b0 "gnome-mime-video", size=16, r.c:1981 recent_ info_get_ icon (info=0x84a82a0, size=16) at gtkrecentmanage r.c:2012 rmenu.c: 955 0x8225a70) at gmain.c:3928 context_ dispatch (context=0x80ecd80) at gmain.c:2045 context_ iterate (context=0x80ecd80, block=1, dispatch=1, self=0x80c3180) at gmain.c:2677
(gdb) bt
#0 0xb7524984 in _int_malloc () from /lib/tls/
#1 0xb75265ee in malloc () from /lib/tls/
#2 0xb73c7b46 in xmlStrndup_
cur=0x85c5db2 "48pt\"\n height=\"48pt\"\n id=\"svg1\"\n sodipodi:
len=4) at xmlstring.c:45
#3 0xb736337b in xmlParseAttValu
#4 0xb73647bf in xmlParseAttribu
#5 0xb7364a2a in xmlParseStartTa
#6 0xb736cb2e in xmlParseChunk_
chunk=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=
size=15349, terminate=0) at parser.c:9858
#7 0xb637cac6 in rsvg_handle_
buf=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=
count=15349, error=0x8429ce4) at rsvg-base.c:1020
#8 0xb6399b80 in gdk_pixbuf_
buf=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=
size=15349, error=0x8429ce4) at io-svg.c:129
#9 0xb7942f56 in IA__gdk_
buf=0x85c00b8 "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=
count=15349, error=0x8429ce4) at gdk-pixbuf-
#10 0xb7afdbb5 in icon_info_
at gtkicontheme.c:2547
#11 0xb7afdf5d in IA__gtk_
#12 0xb7afff0e in IA__gtk_
flags=0, error=0x0) at gtkicontheme.c:1394
#13 0xb7b870e4 in get_cached_icon (name=0x82e02b0 "gnome-mime-video", pixel_size=16) at gtkrecentmanage
#14 0xb7b89455 in IA__gtk_
#15 0xb7b827b7 in idle_populate_func (data=0x8225a70) at gtkrecentchoose
#16 0xb7736ee1 in g_idle_dispatch (source=0x84c8a00, callback=0x8408590, user_data=
#17 0xb7738c42 in IA__g_main_
#18 0xb773bc1f in g_main_
#19 0xb773bfc9 in IA__g_main_loop_run (loop=0x823e0b0) at gmain.c:2881
#20 0xb7b2ff84 in IA__gtk_main () at gtkmain.c:1171
#21 0x0806384c in main ()