Thats the output from the commandline: ( I will get a backtrace, too and
attach it)

$ evolution
CalDAV Eplugin starting up ...

(evolution-2.6:18953): evolution-mail-WARNING **: ignored this junk
plugin: not enabled or we have already loaded one

(evolution-2.6:18953): e-utils-WARNING **: Plugin 'Bogofilter
Ausschuss-Erweiterung' failed to load hook
'org.gnome.evolution.mail.junk:1.0'

(evolution-2.6:18953): camel-WARNING **: camel_exception_get_id called
with NULL parameter.

(evolution-2.6:18953): camel-WARNING **: camel_exception_get_id called
with NULL parameter.

(evolution-2.6:18953): camel-groupwise-provider-WARNING **: Could not
connect..failure connecting

Couldn't open i: URI ungültig
calendar-gui-Message: Check if default client matches
(1152773523.6627.6@pc256 1152773523.6627.6@pc256)

(evolution-2.6:18953): calendar-gui-CRITICAL **: e_day_view_add_event:
assertion `end > add_event_data->day_view->lower' failed

(evolution-2.6:18953): calendar-gui-CRITICAL **: e_week_view_add_event:
assertion `end > add_event_data->week_view->day_starts[0]' failed

...

Another one:

$ evolution
CalDAV Eplugin starting up ...

(evolution-2.6:19530): evolution-mail-WARNING **: ignored this junk
plugin: not enabled or we have already loaded one

(evolution-2.6:19530): e-utils-WARNING **: Plugin 'Bogofilter
Ausschuss-Erweiterung' failed to load hook
'org.gnome.evolution.mail.junk:1.0'

(evolution-2.6:19530): camel-WARNING **: camel_exception_get_id called
with NULL parameter.

(evolution-2.6:19530): camel-WARNING **: camel_exception_get_id called
with NULL parameter.

(evolution-2.6:19530): camel-groupwise-provider-WARNING **: Could not
connect..failure connecting

Couldn't open i: URI ungültig
calendar-gui-Message: Check if default client matches
(1152773523.6627.6@pc256 1152773523.6627.6@pc256)

(evolution-2.6:19530): calendar-gui-CRITICAL **: e_day_view_add_event:
assertion `end > add_event_data->day_view->lower' failed

(evolution-2.6:19530): calendar-gui-CRITICAL **: e_week_view_add_event:
assertion `end > add_event_data->week_view->day_starts[0]' failed
calendar selection changed

(evolution-2.6:19530): calendar-gui-CRITICAL **: e_day_view_add_event:
assertion `end > add_event_data->day_view->lower' failed

(evolution-2.6:19530): calendar-gui-CRITICAL **: e_week_view_add_event:
assertion `end > add_event_data->week_view->day_starts[0]' failed

(evolution-2.6:19530): GLib-GObject-WARNING **: IA__g_object_set_valist:
property `width' of object class `GtkTreeViewColumn' is not writable

(evolution-2.6:19530): libglade-WARNING **: unknown property `ellipsize'
for class `GtkImage'

(evolution-2.6:19530): libglade-WARNING **: unknown property `width_chars'
for class `GtkImage'

(evolution-2.6:19530): libglade-WARNING **: unknown property
`single_line_mode' for class `GtkImage'

(evolution-2.6:19530): libglade-WARNING **: unknown property `angle' for
class `GtkImage'
calendar-gui-Message: Check if default client matches
(1152773523.6627.6@pc256 1152773523.6627.6@pc256)


> Thank you for your work on that. The backtrace is still not really
> usable:
>
> "...
> #5  0xb71209a1 in raise () from /lib/tls/i686/cmov/libc.so.6
> #6  0xb71222b9 in abort () from /lib/tls/i686/cmov/libc.so.6
> #7  0xb749c006 in g_logv () from /usr/lib/libglib-2.0.so.0
> #8  0xb749c03a in g_log () from /usr/lib/libglib-2.0.so.0
> #9  0xb7b0b437 in ?? () from /usr/lib/libgthread-2.0.so.0
> ..."
>
> Could you get a backtrace with libglib2.0-0-dbg installed and run it
> from a command line an copy the exception error written on it?
>
> --
> Evolution crashes with calendar
> https://launchpad.net/bugs/24881
>