Steps to reproduce:
1. Right click on an event and click copy.
2. Right click elsewhere on the calendar and click paste.
3. Crash!


Stack trace:
[New Thread 0xb4619b90 (LWP 30331)]
*** glibc detected *** /usr/bin/evolution: double free or corruption (fasttop): 0x08601050 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb6c98a85]
/lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb6c9c4f0]
/usr/lib/libglib-2.0.so.0(g_free+0x31)[0xb6dbb8b1]
/usr/lib/libecal-1.2.so.7(e_cal_component_free_datetime+0x33)[0xb7aa50d3]
/usr/lib/evolution/2.22/components/libevolution-calendar.so(e_calendar_view_add_event+0x685)[0xb62ff1e5]
/usr/lib/evolution/2.22/components/libevolution-calendar.so[0xb63013fd]
/usr/lib/libgtk-x11-2.0.so.0[0xb75dcbd1]
/usr/lib/libgtk-x11-2.0.so.0[0xb75dbbe5]
/usr/lib/libgtk-x11-2.0.so.0[0xb74a1a81]
/usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x129)[0xb6e3c759]
/usr/lib/libgobject-2.0.so.0[0xb6e50d1d]
/usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x8c6)[0xb6e52916]
/usr/lib/libgobject-2.0.so.0(g_signal_emit_by_name+0x122)[0xb6e52bd2]
/usr/lib/libgtk-x11-2.0.so.0[0xb7503ae2]
/usr/lib/libgtk-x11-2.0.so.0(gtk_selection_convert+0x165)[0xb7505d45]
/usr/lib/libgtk-x11-2.0.so.0(gtk_clipboard_request_text+0x69)[0xb75dca79]
/usr/lib/evolution/2.22/components/libevolution-calendar.so(e_calendar_view_paste_clipboard+0xaa)[0xb62ffbda]
/usr/lib/evolution/2.22/components/libevolution-calendar.so[0xb62ffbfd]
/usr/lib/evolution/2.22/libeutil.so.0[0xb7e0c2a2]
/usr/lib/libgobject-2.0.so.0(g_cclosure_marshal_VOID__VOID+0x4f)[0xb6e49a4f]
/usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x129)[0xb6e3c759]
/usr/lib/libgobject-2.0.so.0[0xb6e50d1d]
/usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x8c6)[0xb6e52916]
/usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29)[0xb6e52c59]
/usr/lib/libgtk-x11-2.0.so.0(gtk_widget_activate+0x58)[0xb75c7278]
/usr/lib/libgtk-x11-2.0.so.0(gtk_menu_shell_activate_item+0x182)[0xb74b0bc2]
/usr/lib/libgtk-x11-2.0.so.0[0xb74b2708]
/usr/lib/libgtk-x11-2.0.so.0[0xb74a9914]
/usr/lib/libgtk-x11-2.0.so.0[0xb74a38d4]
/usr/lib/libgobject-2.0.so.0[0xb6e3b079]
/usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x129)[0xb6e3c759]
/usr/lib/libgobject-2.0.so.0[0xb6e50ea0]
/usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x5fe)[0xb6e5264e]
/usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29)[0xb6e52c59]
/usr/lib/libgtk-x11-2.0.so.0[0xb75c2667]
/usr/lib/libgtk-x11-2.0.so.0(gtk_propagate_event+0xc1)[0xb749cb21]
/usr/lib/libgtk-x11-2.0.so.0(gtk_main_do_event+0x2b8)[0xb749dd88]
/usr/lib/libgdk-x11-2.0.so.0[0xb71f6a9a]
/usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x178)[0xb6db3bf8]
/usr/lib/libglib-2.0.so.0[0xb6db6e5e]
/usr/lib/libglib-2.0.so.0(g_main_loop_run+0x1e7)[0xb6db71e7]
/usr/lib/libbonobo-2.so.0(bonobo_main+0x63)[0xb77a8a93]
/usr/bin/evolution[0x805ed59]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0)[0xb6c43450]
/usr/bin/evolution[0x8050431]
======= Memory map: ========
08048000-08065000 r-xp 00000000 08:01 1851643    /usr/bin/evolution
08065000-08067000 rw-p 0001d000 08:01 1851643    /usr/bin/evolution
08067000-08ef9000 rw-p 08067000 00:00 0          [heap]
b1a99000-b1af9000 rw-s 00000000 00:09 19398701   /SYSV00000000 (deleted)
b1af9000-b1bfd000 rw-p b1af9000 00:00 0 
b2bea000-b2bfe000 r-xp 00000000 08:01 1868675    /usr/lib/evolution/2.22/plugins/liborg-gnome-groupwise-features.so
b2bfe000-b2bff000 rw-p 00014000 08:01 1868675    /usr/lib/evolution/2.22/plugins/liborg-gnome-groupwise-features.so
b2bff000-b2c00000 ---p b2bff000 00:00 0 
b2c00000-b343b000 rw-p b2c00000 00:00 0 
b343b000-b3500000 ---p b343b000 00:00 0 
b3534000-b35bb000 r--p 00000000 08:01 1975870    /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf
b35bb000-b35bc000 ---p b35bb000 00:00 0 
b35bc000-b35fc000 rw-p b35bc000 00:00 0 
b35fc000-b3600000 r-xp 00000000 08:01 263526     /lib/tls/i686/cmov/libnss_dns-2.7.so
b3600000-b3602000 rw-p 00003000 08:01 263526     /lib/tls/i686/cmov/libnss_dns-2.7.so
b3602000-b3604000 r-xp 00000000 08:01 245855     /lib/libnss_mdns4_minimal.so.2
b3604000-b3605000 rw-p 00001000 08:01 245855     /lib/libnss_mdns4_minimal.so.2
b3618000-b3619000 ---p b3618000 00:00 0 
b3619000-b3e19000 rw-p b3619000 00:00 0 
b3e19000-b3e1a000 ---p b3e19000 00:00 0 
b3e1a000-b461a000 rw-p b3e1a000 00:00 0 
b461a000-b467a000 rw-s 00000000 00:09 19333163   /SYSV00000000 (deleted)
b467a000-b477e000 rw-p b467a000 00:00 0 
b477e000-b480f000 r--p 00000000 08:01 1975871    /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
b480f000-b4811000 r-xp 00000000 08:01 1909783    /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b4811000-b4812000 rw-p 00001000 08:01 1909783    /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b4812000-b4818000 r--s 00000000 08:01 589888     /var/cache/fontconfig/945677eb7aeaf62f1d50efc3fb3ec7d8-x86.cache-2
b4818000-b481b000 r--s 00000000 08:01 589898     /var/cache/fontconfig/e383d7ea5fbe662a33d9b44caf393297-x86.cache-2
b481b000-b481c000 r--s 00000000 08:01 589890     /var/cache/fontconfig/c69f04ab05004e31a6d5e715764f16d8-x86.cache-2
b481c000-b481d000 r--s 00000000 08:01 589883     /var/cache/fontconfig/4c73fe0c47614734b17d736dbde7580a-x86.cache-2
b481d000-b4820000 r--s 00000000 08:01 589889     /var/cache/fontconfig/a755afe4a08bf5b97852ceb7400b47bc-x86.cache-2
b4820000-b4827000 r--s 00000000 08:01 596146     /var/cache/fontconfig/6d41288fd70b0be22e8c3a91e032eec0-x86.cache-2
b4827000-b482a000 r--s 00000000 08:01 589895     /var/cache/fontconfig/de156ccd2eddbdc19d37a45b8b2aac9c-x86.cache-2
b482a000-b4832000 r--s 00000000 08:01 589899     /var/cache/fontconfig/e3de0de479f42330eadf588a55fb5bf4-x86.cache-2
b4832000-b483a000 r--s 00000000 08:01 589878     /var/cache/fontconfig/0f34bcd4b6ee430af32735b75db7f02b-x86.cache-2
b483a000-b483b000 r--s 00000000 08:01 589881     /var/cache/fontconfig/4794a0821666d79190d59a36cb4f44b5-x86.cache-2
b483b000-b485d000 r--s 00000000 08:01 595828     /var/cache/fontconfig/365b55f210c0a22e9a19e35191240f32-x86.cache-2
b485d000-b4864000 r--s 00000000 08:01 589893     /var/cache/fontconfig/d52a8644073d54c13679302ca1180695-x86.cache-2
b4864000-b486a000 r--s 00000000 08:01 589877     /var/cache/fontconfig/089dead882dea3570ffc31a9898cfb69-x86.cache-2
b486a000-b486b000 ---p b486a000 00:00 0 
b486b000-b506b000 rw-p b486b000 00:00 0 
b506b000-b5073000 r-xp 00000000 08:01 1868687    /usr/lib/evolution/2.22/plugins/liborg-gnome-publish-calendar.so
b5073000-b5074000 rw-p 00008000 08:01 1868687    /usr/lib/evolution/2.22/plugins/liborg-gnome-publish-calendar.so
b5074000-b5075000 ---p b5074000 00:00 0 
b5075000-b5875000 rw-p b5075000 00:00 0 
b5875000-b5893000 r-xp 00000000 08:01 1868750    /usr/lib/evolution-data-server-1.
Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb65d8740 (LWP 30259)]
0xb7f8c410 in __kernel_vsyscall ()
(gdb) thread apply all bt

+ Trace 196488

Other information:
This crash is repeatable.